./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.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_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/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_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/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_3ed2d369-9f8a-448a-95c3-14cddc4960a4/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 f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- 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 04:49:49,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 04:49:49,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 04:49:49,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 04:49:49,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 04:49:49,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 04:49:49,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 04:49:49,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 04:49:49,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 04:49:49,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 04:49:49,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 04:49:49,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 04:49:49,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 04:49:49,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 04:49:49,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 04:49:49,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 04:49:49,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 04:49:49,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 04:49:49,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 04:49:49,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 04:49:49,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 04:49:49,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 04:49:49,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 04:49:49,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 04:49:49,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 04:49:49,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 04:49:49,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 04:49:49,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 04:49:49,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 04:49:49,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 04:49:49,876 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 04:49:49,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 04:49:49,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 04:49:49,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 04:49:49,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 04:49:49,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 04:49:49,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 04:49:49,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 04:49:49,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 04:49:49,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 04:49:49,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 04:49:49,883 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 04:49:49,898 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 04:49:49,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 04:49:49,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 04:49:49,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 04:49:49,899 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 04:49:49,899 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 04:49:49,900 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 04:49:49,900 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 04:49:49,900 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 04:49:49,900 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 04:49:49,900 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 04:49:49,900 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 04:49:49,901 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 04:49:49,901 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 04:49:49,901 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 04:49:49,901 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 04:49:49,901 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 04:49:49,901 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 04:49:49,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 04:49:49,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 04:49:49,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 04:49:49,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 04:49:49,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 04:49:49,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 04:49:49,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 04:49:49,903 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 04:49:49,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 04:49:49,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 04:49:49,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 04:49:49,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:49:49,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 04:49:49,904 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 04:49:49,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 04:49:49,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 04:49:49,905 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 04:49:49,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 04:49:49,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 04:49:49,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 04:49:49,905 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_3ed2d369-9f8a-448a-95c3-14cddc4960a4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2022-12-14 04:49:50,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 04:49:50,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 04:49:50,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 04:49:50,095 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 04:49:50,095 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 04:49:50,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2022-12-14 04:49:52,627 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 04:49:52,939 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 04:49:52,939 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2022-12-14 04:49:52,960 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/data/3995adf38/7f9002e01a2045d891f27bee6c9ca2d5/FLAG8f2de1b47 [2022-12-14 04:49:53,179 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/data/3995adf38/7f9002e01a2045d891f27bee6c9ca2d5 [2022-12-14 04:49:53,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 04:49:53,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 04:49:53,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 04:49:53,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 04:49:53,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 04:49:53,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:49:53" (1/1) ... [2022-12-14 04:49:53,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2faada95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:53, skipping insertion in model container [2022-12-14 04:49:53,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:49:53" (1/1) ... [2022-12-14 04:49:53,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 04:49:53,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 04:49:53,720 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_bh [2022-12-14 04:49:53,724 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irq [2022-12-14 04:49:53,728 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_unlock_bh [2022-12-14 04:49:53,732 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_unlock_irq [2022-12-14 04:49:53,737 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_unlock_irqrestore [2022-12-14 04:49:53,748 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 04:49:53,779 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:53,780 WARN L623 FunctionHandler]: Unknown extern function _copy_from_user [2022-12-14 04:49:53,781 WARN L623 FunctionHandler]: Unknown extern function _copy_from_user [2022-12-14 04:49:53,781 WARN L623 FunctionHandler]: Unknown extern function __copy_from_user_overflow [2022-12-14 04:49:53,786 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:53,787 WARN L623 FunctionHandler]: Unknown extern function _copy_to_user [2022-12-14 04:49:53,788 WARN L623 FunctionHandler]: Unknown extern function _copy_to_user [2022-12-14 04:49:53,788 WARN L623 FunctionHandler]: Unknown extern function __copy_to_user_overflow [2022-12-14 04:49:53,834 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-12-14 04:49:53,925 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_3ed2d369-9f8a-448a-95c3-14cddc4960a4/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2022-12-14 04:49:53,950 WARN L623 FunctionHandler]: Unknown extern function lockdep_init_map [2022-12-14 04:49:53,973 WARN L623 FunctionHandler]: Unknown extern function tty_termios_baud_rate [2022-12-14 04:49:53,994 WARN L623 FunctionHandler]: Unknown extern function __tasklet_schedule [2022-12-14 04:49:54,056 WARN L623 FunctionHandler]: Unknown extern function _raw_read_lock [2022-12-14 04:49:54,057 WARN L623 FunctionHandler]: Unknown extern function _raw_read_unlock [2022-12-14 04:49:54,060 WARN L623 FunctionHandler]: Unknown extern function up [2022-12-14 04:49:54,065 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-12-14 04:49:54,065 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-12-14 04:49:54,067 WARN L623 FunctionHandler]: Unknown extern function tasklet_init [2022-12-14 04:49:54,068 WARN L623 FunctionHandler]: Unknown extern function ppp_register_channel [2022-12-14 04:49:54,069 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-12-14 04:49:54,072 WARN L623 FunctionHandler]: Unknown extern function _raw_write_lock_irq [2022-12-14 04:49:54,073 WARN L623 FunctionHandler]: Unknown extern function _raw_write_unlock_irq [2022-12-14 04:49:54,073 WARN L623 FunctionHandler]: Unknown extern function down [2022-12-14 04:49:54,074 WARN L623 FunctionHandler]: Unknown extern function tasklet_kill [2022-12-14 04:49:54,074 WARN L623 FunctionHandler]: Unknown extern function ppp_unregister_channel [2022-12-14 04:49:54,074 WARN L623 FunctionHandler]: Unknown extern function skb_queue_purge [2022-12-14 04:49:54,075 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-12-14 04:49:54,087 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,087 WARN L623 FunctionHandler]: Unknown extern function ppp_channel_index [2022-12-14 04:49:54,088 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,088 WARN L623 FunctionHandler]: Unknown extern function ppp_unit_number [2022-12-14 04:49:54,089 WARN L623 FunctionHandler]: Unknown extern function n_tty_ioctl_helper [2022-12-14 04:49:54,090 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,090 WARN L623 FunctionHandler]: Unknown extern function tty_mode_ioctl [2022-12-14 04:49:54,097 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irqsave [2022-12-14 04:49:54,098 WARN L623 FunctionHandler]: Unknown extern function tty_unthrottle [2022-12-14 04:49:54,105 WARN L623 FunctionHandler]: Unknown extern function tty_register_ldisc [2022-12-14 04:49:54,106 WARN L623 FunctionHandler]: Unknown extern function printk [2022-12-14 04:49:54,108 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,109 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,110 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,111 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,111 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,112 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,114 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,115 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,117 WARN L623 FunctionHandler]: Unknown extern function ppp_input_error [2022-12-14 04:49:54,117 WARN L623 FunctionHandler]: Unknown extern function ppp_input [2022-12-14 04:49:54,118 WARN L623 FunctionHandler]: Unknown extern function ppp_output_wakeup [2022-12-14 04:49:54,138 WARN L623 FunctionHandler]: Unknown extern function ppp_output_wakeup [2022-12-14 04:49:54,146 WARN L623 FunctionHandler]: Unknown extern function skb_trim [2022-12-14 04:49:54,147 WARN L623 FunctionHandler]: Unknown extern function skb_pull [2022-12-14 04:49:54,147 WARN L623 FunctionHandler]: Unknown extern function skb_push [2022-12-14 04:49:54,148 WARN L623 FunctionHandler]: Unknown extern function skb_queue_tail [2022-12-14 04:49:54,149 WARN L623 FunctionHandler]: Unknown extern function skb_trim [2022-12-14 04:49:54,155 WARN L623 FunctionHandler]: Unknown extern function skb_put [2022-12-14 04:49:54,157 WARN L623 FunctionHandler]: Unknown extern function start_tty [2022-12-14 04:49:54,158 WARN L623 FunctionHandler]: Unknown extern function stop_tty [2022-12-14 04:49:54,159 WARN L623 FunctionHandler]: Unknown extern function printk [2022-12-14 04:49:54,167 WARN L623 FunctionHandler]: Unknown extern function tty_unregister_ldisc [2022-12-14 04:49:54,167 WARN L623 FunctionHandler]: Unknown extern function printk [2022-12-14 04:49:54,182 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,183 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,183 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,183 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,184 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,184 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,184 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,185 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_alloc [2022-12-14 04:49:54,185 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,185 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,186 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,186 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_alloc [2022-12-14 04:49:54,223 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_alloc [2022-12-14 04:49:54,229 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 04:49:54,229 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 04:49:54,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:49:54,248 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 04:49:54,381 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_bh [2022-12-14 04:49:54,382 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irq [2022-12-14 04:49:54,382 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_unlock_bh [2022-12-14 04:49:54,383 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_unlock_irq [2022-12-14 04:49:54,383 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_unlock_irqrestore [2022-12-14 04:49:54,384 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 04:49:54,385 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,386 WARN L623 FunctionHandler]: Unknown extern function _copy_from_user [2022-12-14 04:49:54,386 WARN L623 FunctionHandler]: Unknown extern function _copy_from_user [2022-12-14 04:49:54,387 WARN L623 FunctionHandler]: Unknown extern function __copy_from_user_overflow [2022-12-14 04:49:54,388 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,388 WARN L623 FunctionHandler]: Unknown extern function _copy_to_user [2022-12-14 04:49:54,389 WARN L623 FunctionHandler]: Unknown extern function _copy_to_user [2022-12-14 04:49:54,389 WARN L623 FunctionHandler]: Unknown extern function __copy_to_user_overflow [2022-12-14 04:49:54,392 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-12-14 04:49:54,397 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_3ed2d369-9f8a-448a-95c3-14cddc4960a4/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2022-12-14 04:49:54,401 WARN L623 FunctionHandler]: Unknown extern function lockdep_init_map [2022-12-14 04:49:54,402 WARN L623 FunctionHandler]: Unknown extern function tty_termios_baud_rate [2022-12-14 04:49:54,404 WARN L623 FunctionHandler]: Unknown extern function __tasklet_schedule [2022-12-14 04:49:54,406 WARN L623 FunctionHandler]: Unknown extern function _raw_read_lock [2022-12-14 04:49:54,407 WARN L623 FunctionHandler]: Unknown extern function _raw_read_unlock [2022-12-14 04:49:54,408 WARN L623 FunctionHandler]: Unknown extern function up [2022-12-14 04:49:54,409 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-12-14 04:49:54,410 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-12-14 04:49:54,411 WARN L623 FunctionHandler]: Unknown extern function tasklet_init [2022-12-14 04:49:54,412 WARN L623 FunctionHandler]: Unknown extern function ppp_register_channel [2022-12-14 04:49:54,413 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-12-14 04:49:54,413 WARN L623 FunctionHandler]: Unknown extern function _raw_write_lock_irq [2022-12-14 04:49:54,414 WARN L623 FunctionHandler]: Unknown extern function _raw_write_unlock_irq [2022-12-14 04:49:54,415 WARN L623 FunctionHandler]: Unknown extern function down [2022-12-14 04:49:54,415 WARN L623 FunctionHandler]: Unknown extern function tasklet_kill [2022-12-14 04:49:54,415 WARN L623 FunctionHandler]: Unknown extern function ppp_unregister_channel [2022-12-14 04:49:54,416 WARN L623 FunctionHandler]: Unknown extern function skb_queue_purge [2022-12-14 04:49:54,416 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-12-14 04:49:54,418 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,418 WARN L623 FunctionHandler]: Unknown extern function ppp_channel_index [2022-12-14 04:49:54,419 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,419 WARN L623 FunctionHandler]: Unknown extern function ppp_unit_number [2022-12-14 04:49:54,420 WARN L623 FunctionHandler]: Unknown extern function n_tty_ioctl_helper [2022-12-14 04:49:54,420 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,421 WARN L623 FunctionHandler]: Unknown extern function tty_mode_ioctl [2022-12-14 04:49:54,422 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irqsave [2022-12-14 04:49:54,423 WARN L623 FunctionHandler]: Unknown extern function tty_unthrottle [2022-12-14 04:49:54,425 WARN L623 FunctionHandler]: Unknown extern function tty_register_ldisc [2022-12-14 04:49:54,426 WARN L623 FunctionHandler]: Unknown extern function printk [2022-12-14 04:49:54,427 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,428 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,429 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,430 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,430 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,431 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,433 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,434 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-12-14 04:49:54,435 WARN L623 FunctionHandler]: Unknown extern function ppp_input_error [2022-12-14 04:49:54,436 WARN L623 FunctionHandler]: Unknown extern function ppp_input [2022-12-14 04:49:54,436 WARN L623 FunctionHandler]: Unknown extern function ppp_output_wakeup [2022-12-14 04:49:54,455 WARN L623 FunctionHandler]: Unknown extern function ppp_output_wakeup [2022-12-14 04:49:54,458 WARN L623 FunctionHandler]: Unknown extern function skb_trim [2022-12-14 04:49:54,459 WARN L623 FunctionHandler]: Unknown extern function skb_pull [2022-12-14 04:49:54,459 WARN L623 FunctionHandler]: Unknown extern function skb_push [2022-12-14 04:49:54,460 WARN L623 FunctionHandler]: Unknown extern function skb_queue_tail [2022-12-14 04:49:54,461 WARN L623 FunctionHandler]: Unknown extern function skb_trim [2022-12-14 04:49:54,466 WARN L623 FunctionHandler]: Unknown extern function skb_put [2022-12-14 04:49:54,468 WARN L623 FunctionHandler]: Unknown extern function start_tty [2022-12-14 04:49:54,469 WARN L623 FunctionHandler]: Unknown extern function stop_tty [2022-12-14 04:49:54,470 WARN L623 FunctionHandler]: Unknown extern function printk [2022-12-14 04:49:54,474 WARN L623 FunctionHandler]: Unknown extern function tty_unregister_ldisc [2022-12-14 04:49:54,475 WARN L623 FunctionHandler]: Unknown extern function printk [2022-12-14 04:49:54,481 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,482 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,482 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,482 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,482 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,483 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,483 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,484 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_alloc [2022-12-14 04:49:54,484 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,484 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,484 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-12-14 04:49:54,485 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_alloc [2022-12-14 04:49:54,490 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_alloc [2022-12-14 04:49:54,494 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 04:49:54,494 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 04:49:54,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:49:54,532 INFO L208 MainTranslator]: Completed translation [2022-12-14 04:49:54,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:54 WrapperNode [2022-12-14 04:49:54,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 04:49:54,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 04:49:54,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 04:49:54,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 04:49:54,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:54" (1/1) ... [2022-12-14 04:49:54,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:54" (1/1) ... [2022-12-14 04:49:54,642 INFO L138 Inliner]: procedures = 180, calls = 578, calls flagged for inlining = 99, calls inlined = 93, statements flattened = 2411 [2022-12-14 04:49:54,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 04:49:54,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 04:49:54,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 04:49:54,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 04:49:54,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:54" (1/1) ... [2022-12-14 04:49:54,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:54" (1/1) ... [2022-12-14 04:49:54,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:54" (1/1) ... [2022-12-14 04:49:54,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:54" (1/1) ... [2022-12-14 04:49:54,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:54" (1/1) ... [2022-12-14 04:49:54,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:54" (1/1) ... [2022-12-14 04:49:54,738 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:54" (1/1) ... [2022-12-14 04:49:54,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:54" (1/1) ... [2022-12-14 04:49:54,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 04:49:54,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 04:49:54,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 04:49:54,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 04:49:54,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:54" (1/1) ... [2022-12-14 04:49:54,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:49:54,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:49:54,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 04:49:54,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 04:49:54,801 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-12-14 04:49:54,801 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-12-14 04:49:54,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-12-14 04:49:54,801 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_push [2022-12-14 04:49:54,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_push [2022-12-14 04:49:54,801 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2022-12-14 04:49:54,801 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2022-12-14 04:49:54,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-12-14 04:49:54,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-12-14 04:49:54,802 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-12-14 04:49:54,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-12-14 04:49:54,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 04:49:54,802 INFO L130 BoogieDeclarations]: Found specification of procedure crc_ccitt_byte [2022-12-14 04:49:54,802 INFO L138 BoogieDeclarations]: Found implementation of procedure crc_ccitt_byte [2022-12-14 04:49:54,802 INFO L130 BoogieDeclarations]: Found specification of procedure ap_put [2022-12-14 04:49:54,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_put [2022-12-14 04:49:54,802 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_output_wakeup [2022-12-14 04:49:54,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_output_wakeup [2022-12-14 04:49:54,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-12-14 04:49:54,802 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-12-14 04:49:54,802 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-12-14 04:49:54,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-12-14 04:49:54,802 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-12-14 04:49:54,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-12-14 04:49:54,803 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_hangup [2022-12-14 04:49:54,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_hangup [2022-12-14 04:49:54,803 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-12-14 04:49:54,803 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-12-14 04:49:54,803 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2022-12-14 04:49:54,803 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2022-12-14 04:49:54,803 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_be16 [2022-12-14 04:49:54,803 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_be16 [2022-12-14 04:49:54,803 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-12-14 04:49:54,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-12-14 04:49:54,803 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-12-14 04:49:54,803 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-12-14 04:49:54,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 04:49:54,803 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-12-14 04:49:54,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-12-14 04:49:54,803 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-12-14 04:49:54,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-12-14 04:49:54,804 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-12-14 04:49:54,804 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-12-14 04:49:54,804 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 04:49:54,804 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 04:49:54,804 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_close [2022-12-14 04:49:54,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_close [2022-12-14 04:49:54,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 04:49:54,804 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_poll [2022-12-14 04:49:54,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_poll [2022-12-14 04:49:54,804 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-12-14 04:49:54,804 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-12-14 04:49:54,804 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-12-14 04:49:54,804 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-12-14 04:49:54,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 04:49:54,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 04:49:54,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 04:49:54,805 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-12-14 04:49:54,805 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-12-14 04:49:54,805 INFO L130 BoogieDeclarations]: Found specification of procedure ap_get [2022-12-14 04:49:54,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_get [2022-12-14 04:49:54,805 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2022-12-14 04:49:54,805 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2022-12-14 04:49:54,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 04:49:54,805 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-12-14 04:49:54,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-12-14 04:49:54,805 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2022-12-14 04:49:54,805 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2022-12-14 04:49:54,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 04:49:54,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 04:49:54,805 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-12-14 04:49:54,805 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-12-14 04:49:54,805 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-12-14 04:49:54,805 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-12-14 04:49:54,806 INFO L130 BoogieDeclarations]: Found specification of procedure async_lcp_peek [2022-12-14 04:49:54,806 INFO L138 BoogieDeclarations]: Found implementation of procedure async_lcp_peek [2022-12-14 04:49:54,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 04:49:54,806 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-12-14 04:49:54,806 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-12-14 04:49:54,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-12-14 04:49:54,806 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-12-14 04:49:54,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-12-14 04:49:54,806 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-12-14 04:49:54,806 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-12-14 04:49:54,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 04:49:54,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 04:49:54,806 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_ioctl [2022-12-14 04:49:54,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_ioctl [2022-12-14 04:49:54,806 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-12-14 04:49:54,806 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-12-14 04:49:55,115 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 04:49:55,117 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 04:49:55,422 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-12-14 04:49:58,457 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 04:49:59,177 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 04:49:59,177 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 04:49:59,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:49:59 BoogieIcfgContainer [2022-12-14 04:49:59,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 04:49:59,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 04:49:59,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 04:49:59,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 04:49:59,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:49:53" (1/3) ... [2022-12-14 04:49:59,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be0d4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:49:59, skipping insertion in model container [2022-12-14 04:49:59,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:54" (2/3) ... [2022-12-14 04:49:59,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be0d4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:49:59, skipping insertion in model container [2022-12-14 04:49:59,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:49:59" (3/3) ... [2022-12-14 04:49:59,187 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2022-12-14 04:49:59,201 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 04:49:59,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 04:49:59,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 04:49:59,253 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;@3b58fbc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 04:49:59,253 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 04:49:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand has 474 states, 320 states have (on average 1.440625) internal successors, (461), 334 states have internal predecessors, (461), 116 states have call successors, (116), 37 states have call predecessors, (116), 36 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2022-12-14 04:49:59,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 04:49:59,267 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:49:59,268 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:49:59,268 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:49:59,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:49:59,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2001215707, now seen corresponding path program 1 times [2022-12-14 04:49:59,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:49:59,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147042061] [2022-12-14 04:49:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:49:59,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:49:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:49:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-12-14 04:49:59,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:49:59,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147042061] [2022-12-14 04:49:59,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147042061] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:49:59,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:49:59,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:49:59,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146845477] [2022-12-14 04:49:59,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:49:59,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:49:59,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:49:59,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:49:59,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:49:59,621 INFO L87 Difference]: Start difference. First operand has 474 states, 320 states have (on average 1.440625) internal successors, (461), 334 states have internal predecessors, (461), 116 states have call successors, (116), 37 states have call predecessors, (116), 36 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-12-14 04:50:03,255 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 04:50:03,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:50:03,401 INFO L93 Difference]: Finished difference Result 1364 states and 2015 transitions. [2022-12-14 04:50:03,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:50:03,403 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 71 [2022-12-14 04:50:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:50:03,415 INFO L225 Difference]: With dead ends: 1364 [2022-12-14 04:50:03,415 INFO L226 Difference]: Without dead ends: 899 [2022-12-14 04:50:03,419 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 04:50:03,421 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 626 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:50:03,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 1248 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 220 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-12-14 04:50:03,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-12-14 04:50:03,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 898. [2022-12-14 04:50:03,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 617 states have (on average 1.4197730956239871) internal successors, (876), 633 states have internal predecessors, (876), 210 states have call successors, (210), 71 states have call predecessors, (210), 70 states have return successors, (209), 208 states have call predecessors, (209), 209 states have call successors, (209) [2022-12-14 04:50:03,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1295 transitions. [2022-12-14 04:50:03,501 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1295 transitions. Word has length 71 [2022-12-14 04:50:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:50:03,501 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1295 transitions. [2022-12-14 04:50:03,501 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-12-14 04:50:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1295 transitions. [2022-12-14 04:50:03,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 04:50:03,504 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:50:03,504 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:50:03,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 04:50:03,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:50:03,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:50:03,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1494131551, now seen corresponding path program 1 times [2022-12-14 04:50:03,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:50:03,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989815484] [2022-12-14 04:50:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:03,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:50:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-12-14 04:50:03,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:50:03,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989815484] [2022-12-14 04:50:03,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989815484] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:50:03,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:50:03,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:50:03,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544039512] [2022-12-14 04:50:03,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:50:03,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:50:03,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:50:03,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:50:03,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:50:03,646 INFO L87 Difference]: Start difference. First operand 898 states and 1295 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-12-14 04:50:06,905 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 04:50:06,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:50:06,939 INFO L93 Difference]: Finished difference Result 1773 states and 2585 transitions. [2022-12-14 04:50:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:50:06,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 74 [2022-12-14 04:50:06,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:50:06,947 INFO L225 Difference]: With dead ends: 1773 [2022-12-14 04:50:06,947 INFO L226 Difference]: Without dead ends: 1768 [2022-12-14 04:50:06,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:50:06,949 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 652 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1902 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:50:06,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 1902 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 334 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 04:50:06,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2022-12-14 04:50:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1759. [2022-12-14 04:50:07,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1210 states have (on average 1.4231404958677687) internal successors, (1722), 1242 states have internal predecessors, (1722), 408 states have call successors, (408), 141 states have call predecessors, (408), 140 states have return successors, (437), 404 states have call predecessors, (437), 407 states have call successors, (437) [2022-12-14 04:50:07,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 2567 transitions. [2022-12-14 04:50:07,016 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 2567 transitions. Word has length 74 [2022-12-14 04:50:07,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:50:07,016 INFO L495 AbstractCegarLoop]: Abstraction has 1759 states and 2567 transitions. [2022-12-14 04:50:07,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-12-14 04:50:07,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 2567 transitions. [2022-12-14 04:50:07,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 04:50:07,023 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:50:07,023 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:50:07,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 04:50:07,024 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:50:07,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:50:07,024 INFO L85 PathProgramCache]: Analyzing trace with hash -116350275, now seen corresponding path program 1 times [2022-12-14 04:50:07,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:50:07,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694476630] [2022-12-14 04:50:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:07,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:50:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-12-14 04:50:07,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:50:07,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694476630] [2022-12-14 04:50:07,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694476630] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:50:07,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:50:07,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:50:07,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589645195] [2022-12-14 04:50:07,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:50:07,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:50:07,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:50:07,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:50:07,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:50:07,190 INFO L87 Difference]: Start difference. First operand 1759 states and 2567 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 04:50:10,422 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 04:50:10,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:50:10,436 INFO L93 Difference]: Finished difference Result 4344 states and 6311 transitions. [2022-12-14 04:50:10,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:50:10,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 114 [2022-12-14 04:50:10,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:50:10,445 INFO L225 Difference]: With dead ends: 4344 [2022-12-14 04:50:10,445 INFO L226 Difference]: Without dead ends: 2606 [2022-12-14 04:50:10,450 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 04:50:10,450 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 339 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:50:10,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 1122 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 240 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 04:50:10,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2022-12-14 04:50:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2599. [2022-12-14 04:50:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 1794 states have (on average 1.4169453734671127) internal successors, (2542), 1836 states have internal predecessors, (2542), 592 states have call successors, (592), 213 states have call predecessors, (592), 212 states have return successors, (631), 586 states have call predecessors, (631), 591 states have call successors, (631) [2022-12-14 04:50:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 3765 transitions. [2022-12-14 04:50:10,528 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 3765 transitions. Word has length 114 [2022-12-14 04:50:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:50:10,529 INFO L495 AbstractCegarLoop]: Abstraction has 2599 states and 3765 transitions. [2022-12-14 04:50:10,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 04:50:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 3765 transitions. [2022-12-14 04:50:10,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 04:50:10,535 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:50:10,535 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:50:10,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 04:50:10,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:50:10,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:50:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1408448037, now seen corresponding path program 1 times [2022-12-14 04:50:10,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:50:10,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939013640] [2022-12-14 04:50:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:10,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:50:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-12-14 04:50:10,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:50:10,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939013640] [2022-12-14 04:50:10,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939013640] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:50:10,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:50:10,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:50:10,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784161625] [2022-12-14 04:50:10,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:50:10,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:50:10,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:50:10,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:50:10,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:50:10,636 INFO L87 Difference]: Start difference. First operand 2599 states and 3765 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 04:50:13,713 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 04:50:13,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:50:13,733 INFO L93 Difference]: Finished difference Result 6435 states and 9288 transitions. [2022-12-14 04:50:13,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:50:13,733 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), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 146 [2022-12-14 04:50:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:50:13,747 INFO L225 Difference]: With dead ends: 6435 [2022-12-14 04:50:13,747 INFO L226 Difference]: Without dead ends: 3857 [2022-12-14 04:50:13,754 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 04:50:13,755 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 448 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:50:13,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1390 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 04:50:13,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2022-12-14 04:50:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 3851. [2022-12-14 04:50:13,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3851 states, 2695 states have (on average 1.4241187384044527) internal successors, (3838), 2761 states have internal predecessors, (3838), 821 states have call successors, (821), 335 states have call predecessors, (821), 334 states have return successors, (882), 811 states have call predecessors, (882), 820 states have call successors, (882) [2022-12-14 04:50:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3851 states to 3851 states and 5541 transitions. [2022-12-14 04:50:13,914 INFO L78 Accepts]: Start accepts. Automaton has 3851 states and 5541 transitions. Word has length 146 [2022-12-14 04:50:13,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:50:13,914 INFO L495 AbstractCegarLoop]: Abstraction has 3851 states and 5541 transitions. [2022-12-14 04:50:13,915 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), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 04:50:13,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3851 states and 5541 transitions. [2022-12-14 04:50:13,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 04:50:13,923 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:50:13,923 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:50:13,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 04:50:13,924 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:50:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:50:13,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1791656517, now seen corresponding path program 1 times [2022-12-14 04:50:13,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:50:13,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149078725] [2022-12-14 04:50:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:13,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:50:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-12-14 04:50:14,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:50:14,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149078725] [2022-12-14 04:50:14,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149078725] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:50:14,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:50:14,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:50:14,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260663978] [2022-12-14 04:50:14,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:50:14,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:50:14,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:50:14,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:50:14,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:50:14,074 INFO L87 Difference]: Start difference. First operand 3851 states and 5541 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 04:50:17,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 04:50:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:50:17,067 INFO L93 Difference]: Finished difference Result 9392 states and 13441 transitions. [2022-12-14 04:50:17,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:50:17,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 141 [2022-12-14 04:50:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:50:17,094 INFO L225 Difference]: With dead ends: 9392 [2022-12-14 04:50:17,094 INFO L226 Difference]: Without dead ends: 5570 [2022-12-14 04:50:17,101 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 04:50:17,102 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 447 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 04:50:17,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 1161 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 04:50:17,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2022-12-14 04:50:17,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 5463. [2022-12-14 04:50:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5463 states, 3849 states have (on average 1.408677578591842) internal successors, (5422), 3934 states have internal predecessors, (5422), 1103 states have call successors, (1103), 511 states have call predecessors, (1103), 510 states have return successors, (1192), 1098 states have call predecessors, (1192), 1102 states have call successors, (1192) [2022-12-14 04:50:17,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 7717 transitions. [2022-12-14 04:50:17,266 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 7717 transitions. Word has length 141 [2022-12-14 04:50:17,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:50:17,267 INFO L495 AbstractCegarLoop]: Abstraction has 5463 states and 7717 transitions. [2022-12-14 04:50:17,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 04:50:17,267 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 7717 transitions. [2022-12-14 04:50:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-14 04:50:17,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:50:17,273 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:50:17,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 04:50:17,273 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:50:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:50:17,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1859844287, now seen corresponding path program 1 times [2022-12-14 04:50:17,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:50:17,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927679309] [2022-12-14 04:50:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:17,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:50:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-12-14 04:50:17,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:50:17,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927679309] [2022-12-14 04:50:17,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927679309] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:50:17,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:50:17,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:50:17,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489286167] [2022-12-14 04:50:17,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:50:17,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:50:17,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:50:17,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:50:17,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:50:17,565 INFO L87 Difference]: Start difference. First operand 5463 states and 7717 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 04:50:21,498 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 04:50:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:50:21,556 INFO L93 Difference]: Finished difference Result 8208 states and 11643 transitions. [2022-12-14 04:50:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:50:21,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 135 [2022-12-14 04:50:21,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:50:21,581 INFO L225 Difference]: With dead ends: 8208 [2022-12-14 04:50:21,581 INFO L226 Difference]: Without dead ends: 8203 [2022-12-14 04:50:21,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:50:21,585 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 625 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 04:50:21,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 1888 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 331 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 04:50:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2022-12-14 04:50:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8169. [2022-12-14 04:50:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8169 states, 5751 states have (on average 1.4082768214223613) internal successors, (8099), 5879 states have internal predecessors, (8099), 1652 states have call successors, (1652), 766 states have call predecessors, (1652), 765 states have return successors, (1831), 1645 states have call predecessors, (1831), 1651 states have call successors, (1831) [2022-12-14 04:50:21,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8169 states to 8169 states and 11582 transitions. [2022-12-14 04:50:21,857 INFO L78 Accepts]: Start accepts. Automaton has 8169 states and 11582 transitions. Word has length 135 [2022-12-14 04:50:21,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:50:21,857 INFO L495 AbstractCegarLoop]: Abstraction has 8169 states and 11582 transitions. [2022-12-14 04:50:21,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 04:50:21,857 INFO L276 IsEmpty]: Start isEmpty. Operand 8169 states and 11582 transitions. [2022-12-14 04:50:21,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 04:50:21,863 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:50:21,863 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:50:21,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 04:50:21,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:50:21,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:50:21,864 INFO L85 PathProgramCache]: Analyzing trace with hash -884568551, now seen corresponding path program 1 times [2022-12-14 04:50:21,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:50:21,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114289452] [2022-12-14 04:50:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:21,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:50:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-12-14 04:50:21,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:50:21,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114289452] [2022-12-14 04:50:21,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114289452] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:50:21,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:50:21,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:50:21,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505882322] [2022-12-14 04:50:21,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:50:21,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:50:21,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:50:21,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:50:21,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:50:21,941 INFO L87 Difference]: Start difference. First operand 8169 states and 11582 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 04:50:24,791 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 04:50:24,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:50:24,837 INFO L93 Difference]: Finished difference Result 10964 states and 15756 transitions. [2022-12-14 04:50:24,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:50:24,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 145 [2022-12-14 04:50:24,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:50:24,878 INFO L225 Difference]: With dead ends: 10964 [2022-12-14 04:50:24,878 INFO L226 Difference]: Without dead ends: 8219 [2022-12-14 04:50:24,885 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 04:50:24,886 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 4 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 04:50:24,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1126 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 04:50:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8219 states. [2022-12-14 04:50:25,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8219 to 8219. [2022-12-14 04:50:25,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8219 states, 5791 states have (on average 1.4054567432222413) internal successors, (8139), 5929 states have internal predecessors, (8139), 1652 states have call successors, (1652), 766 states have call predecessors, (1652), 775 states have return successors, (1841), 1645 states have call predecessors, (1841), 1651 states have call successors, (1841) [2022-12-14 04:50:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8219 states to 8219 states and 11632 transitions. [2022-12-14 04:50:25,200 INFO L78 Accepts]: Start accepts. Automaton has 8219 states and 11632 transitions. Word has length 145 [2022-12-14 04:50:25,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:50:25,201 INFO L495 AbstractCegarLoop]: Abstraction has 8219 states and 11632 transitions. [2022-12-14 04:50:25,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 04:50:25,202 INFO L276 IsEmpty]: Start isEmpty. Operand 8219 states and 11632 transitions. [2022-12-14 04:50:25,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 04:50:25,212 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:50:25,212 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 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] [2022-12-14 04:50:25,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 04:50:25,212 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:50:25,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:50:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2047754455, now seen corresponding path program 1 times [2022-12-14 04:50:25,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:50:25,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722312484] [2022-12-14 04:50:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:25,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:50:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-12-14 04:50:25,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:50:25,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722312484] [2022-12-14 04:50:25,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722312484] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:50:25,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574302192] [2022-12-14 04:50:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:25,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:50:25,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:50:25,615 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:50:25,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 04:50:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:26,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 04:50:26,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:50:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 89 proven. 5 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-12-14 04:50:26,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:50:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-12-14 04:50:27,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574302192] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:50:27,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2110688620] [2022-12-14 04:50:27,163 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2022-12-14 04:50:27,163 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:50:27,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:50:27,170 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:50:27,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:50:27,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 195 [2022-12-14 04:50:27,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 197 [2022-12-14 04:50:27,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:50:27,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:50:27,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:50:27,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:50:27,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:50:27,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:50:27,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:50:27,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:50:27,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 33 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2022-12-14 04:50:27,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:50:27,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:50:27,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:50:27,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:50:27,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:50:27,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:50:27,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:50:27,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:50:27,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 33 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2022-12-14 04:50:36,430 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 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 04:50:36,436 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 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 04:50:36,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-12-14 04:50:36,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:50:36,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 139 [2022-12-14 04:50:36,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:50:36,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 127 [2022-12-14 04:50:36,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:50:36,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 139 [2022-12-14 04:50:36,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:50:36,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 127 [2022-12-14 04:50:37,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 04:50:37,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 04:50:37,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 04:50:37,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 04:50:37,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:50:53,091 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 117 for LOIs [2022-12-14 04:50:53,148 INFO L197 IcfgInterpreter]: Interpreting procedure ppp_asynctty_hangup with input of size 125 for LOIs [2022-12-14 04:50:53,352 INFO L197 IcfgInterpreter]: Interpreting procedure ppp_asynctty_close with input of size 125 for LOIs [2022-12-14 04:50:53,434 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 0 case distinctions, treesize of input 39 treesize of output 23 [2022-12-14 04:50:53,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-12-14 04:50:53,462 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 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 04:50:53,554 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 0 case distinctions, treesize of input 38 treesize of output 22 [2022-12-14 04:50:53,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-12-14 04:50:53,573 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 0 case distinctions, treesize of input 25 treesize of output 15 [2022-12-14 04:50:53,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 04:50:53,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 04:50:53,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 04:50:53,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 04:50:54,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 04:50:54,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 04:50:54,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 04:50:54,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 04:50:55,313 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 0 case distinctions, treesize of input 25 treesize of output 15 [2022-12-14 04:50:55,327 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 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 04:50:55,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-12-14 04:50:55,352 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_skb_free with input of size 144 for LOIs [2022-12-14 04:50:55,909 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_set_remove with input of size 147 for LOIs [2022-12-14 04:50:56,249 INFO L197 IcfgInterpreter]: Interpreting procedure kfree with input of size 70 for LOIs [2022-12-14 04:50:56,254 INFO L197 IcfgInterpreter]: Interpreting procedure atomic_dec_and_test with input of size 125 for LOIs [2022-12-14 04:50:56,270 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_error with input of size 107 for LOIs [2022-12-14 04:50:56,283 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:56:06,555 WARN L233 SmtUtils]: Spent 4.15m on a formula simplification. DAG size of input: 144 DAG size of output: 110 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:58:55,448 WARN L233 SmtUtils]: Spent 2.81m on a formula simplification. DAG size of input: 148 DAG size of output: 114 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:00:58,365 WARN L233 SmtUtils]: Spent 2.00m on a formula simplification. DAG size of input: 140 DAG size of output: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:01:20,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '108336#(and (<= 0 ~ldv_state_variable_2~0) (= |~#set_impl~0.offset| 0) (= ~LDV_IN_INTERRUPT~0 1) (<= ~async_ops_group0~0.base 0) (= ~LDV_SKBS~0.base 0) (= ~ldv_retval_1~0 0) (<= ~last_index~0 0) (= ~LDV_SKBS~0.offset 0) (<= ~ldv_state_variable_1~0 1) (<= ~ppp_ldisc_group1~0.base 0) (<= 0 ~ppp_ldisc_group1~0.offset) (<= 0 ~ldv_state_variable_1~0) (<= 0 ~ppp_ldisc_group1~0.base) (= |~#async_ops~0.offset| 0) (= ~ldv_state_variable_0~0 2) (<= 0 ~async_ops_group0~0.offset) (= ~ref_cnt~0 0) (= |~#disc_data_lock~0.offset| 0) (= |~#async_ops~0.base| 13) (= |#NULL.offset| 0) (<= ~ppp_ldisc_group1~0.offset 0) (= ~ldv_retval_0~0 0) (<= |~#disc_data_lock~0.base| 14) (<= 0 |~#ppp_ldisc~0.offset|) (<= |~#ppp_ldisc~0.base| 15) (<= 0 ~async_ops_group0~0.base) (<= ~ldv_state_variable_2~0 1) (<= |~#ppp_ldisc~0.offset| 0) (= 16 |~#set_impl~0.base|) (<= 0 |#StackHeapBarrier|) (<= 15 |~#ppp_ldisc~0.base|) (= (ite (= ~last_index~0 0) 1 0) 0) (<= ~async_ops_group0~0.offset 0) (= ~flag_time~0 250) (= |#NULL.base| 0) (<= 14 |~#disc_data_lock~0.base|))' at error location [2022-12-14 05:01:20,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:01:20,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:01:20,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2022-12-14 05:01:20,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953359513] [2022-12-14 05:01:20,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:01:20,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 05:01:20,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:01:20,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 05:01:20,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=6688, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 05:01:20,664 INFO L87 Difference]: Start difference. First operand 8219 states and 11632 transitions. Second operand has 14 states, 14 states have (on average 9.428571428571429) internal successors, (132), 13 states have internal predecessors, (132), 9 states have call successors, (38), 7 states have call predecessors, (38), 7 states have return successors, (38), 9 states have call predecessors, (38), 8 states have call successors, (38) [2022-12-14 05:01:29,775 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 05:01:30,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:01:30,051 INFO L93 Difference]: Finished difference Result 18644 states and 26464 transitions. [2022-12-14 05:01:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 05:01:30,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.428571428571429) internal successors, (132), 13 states have internal predecessors, (132), 9 states have call successors, (38), 7 states have call predecessors, (38), 7 states have return successors, (38), 9 states have call predecessors, (38), 8 states have call successors, (38) Word has length 146 [2022-12-14 05:01:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:01:30,081 INFO L225 Difference]: With dead ends: 18644 [2022-12-14 05:01:30,081 INFO L226 Difference]: Without dead ends: 10454 [2022-12-14 05:01:30,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 355 SyntacticMatches, 17 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 624.6s TimeCoverageRelationStatistics Valid=697, Invalid=7859, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 05:01:30,099 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 2287 mSDsluCounter, 2240 mSDsCounter, 0 mSdLazyCounter, 3821 mSolverCounterSat, 1320 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2379 SdHoareTripleChecker+Valid, 2791 SdHoareTripleChecker+Invalid, 5142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1320 IncrementalHoareTripleChecker+Valid, 3821 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:01:30,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2379 Valid, 2791 Invalid, 5142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1320 Valid, 3821 Invalid, 1 Unknown, 0 Unchecked, 8.8s Time] [2022-12-14 05:01:30,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10454 states. [2022-12-14 05:01:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10454 to 10235. [2022-12-14 05:01:30,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10235 states, 7063 states have (on average 1.3845391476709614) internal successors, (9779), 7275 states have internal predecessors, (9779), 2145 states have call successors, (2145), 973 states have call predecessors, (2145), 1026 states have return successors, (2520), 2150 states have call predecessors, (2520), 2144 states have call successors, (2520) [2022-12-14 05:01:30,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10235 states to 10235 states and 14444 transitions. [2022-12-14 05:01:30,535 INFO L78 Accepts]: Start accepts. Automaton has 10235 states and 14444 transitions. Word has length 146 [2022-12-14 05:01:30,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:01:30,535 INFO L495 AbstractCegarLoop]: Abstraction has 10235 states and 14444 transitions. [2022-12-14 05:01:30,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.428571428571429) internal successors, (132), 13 states have internal predecessors, (132), 9 states have call successors, (38), 7 states have call predecessors, (38), 7 states have return successors, (38), 9 states have call predecessors, (38), 8 states have call successors, (38) [2022-12-14 05:01:30,536 INFO L276 IsEmpty]: Start isEmpty. Operand 10235 states and 14444 transitions. [2022-12-14 05:01:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 05:01:30,554 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:01:30,554 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 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] [2022-12-14 05:01:30,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:01:30,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:01:30,755 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:01:30,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:01:30,756 INFO L85 PathProgramCache]: Analyzing trace with hash -37386447, now seen corresponding path program 1 times [2022-12-14 05:01:30,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:01:30,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529138828] [2022-12-14 05:01:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:01:30,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:01:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:01:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-12-14 05:01:31,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:01:31,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529138828] [2022-12-14 05:01:31,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529138828] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:01:31,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:01:31,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 05:01:31,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345855370] [2022-12-14 05:01:31,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:01:31,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:01:31,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:01:31,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:01:31,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:01:31,080 INFO L87 Difference]: Start difference. First operand 10235 states and 14444 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 05:01:34,696 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 05:01:34,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:01:34,783 INFO L93 Difference]: Finished difference Result 20527 states and 28986 transitions. [2022-12-14 05:01:34,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:01:34,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 161 [2022-12-14 05:01:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:01:34,814 INFO L225 Difference]: With dead ends: 20527 [2022-12-14 05:01:34,814 INFO L226 Difference]: Without dead ends: 10321 [2022-12-14 05:01:34,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:01:34,832 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 2 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2242 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:01:34,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2242 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 444 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-12-14 05:01:34,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10321 states. [2022-12-14 05:01:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10321 to 10283. [2022-12-14 05:01:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10283 states, 7099 states have (on average 1.3825890970559234) internal successors, (9815), 7311 states have internal predecessors, (9815), 2145 states have call successors, (2145), 973 states have call predecessors, (2145), 1038 states have return successors, (2535), 2162 states have call predecessors, (2535), 2144 states have call successors, (2535) [2022-12-14 05:01:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10283 states to 10283 states and 14495 transitions. [2022-12-14 05:01:35,150 INFO L78 Accepts]: Start accepts. Automaton has 10283 states and 14495 transitions. Word has length 161 [2022-12-14 05:01:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:01:35,150 INFO L495 AbstractCegarLoop]: Abstraction has 10283 states and 14495 transitions. [2022-12-14 05:01:35,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 05:01:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 10283 states and 14495 transitions. [2022-12-14 05:01:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-12-14 05:01:35,171 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:01:35,171 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 4, 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 05:01:35,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 05:01:35,172 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:01:35,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:01:35,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1605870167, now seen corresponding path program 1 times [2022-12-14 05:01:35,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:01:35,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014653269] [2022-12-14 05:01:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:01:35,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:01:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:01:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-12-14 05:01:35,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:01:35,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014653269] [2022-12-14 05:01:35,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014653269] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:01:35,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5349667] [2022-12-14 05:01:35,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:01:35,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:01:35,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:01:35,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:01:35,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:01:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:01:36,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:01:36,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:01:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-12-14 05:01:36,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:01:36,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5349667] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:01:36,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:01:36,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 05:01:36,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918462744] [2022-12-14 05:01:36,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:01:36,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:01:36,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:01:36,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:01:36,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:01:36,168 INFO L87 Difference]: Start difference. First operand 10283 states and 14495 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 05:01:39,489 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 05:01:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:01:39,635 INFO L93 Difference]: Finished difference Result 23580 states and 33519 transitions. [2022-12-14 05:01:39,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:01:39,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 165 [2022-12-14 05:01:39,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:01:39,676 INFO L225 Difference]: With dead ends: 23580 [2022-12-14 05:01:39,676 INFO L226 Difference]: Without dead ends: 13326 [2022-12-14 05:01:39,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:01:39,698 INFO L413 NwaCegarLoop]: 784 mSDtfsCounter, 592 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:01:39,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [620 Valid, 1514 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 576 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 05:01:39,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13326 states. [2022-12-14 05:01:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13326 to 12255. [2022-12-14 05:01:40,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12255 states, 8547 states have (on average 1.3896103896103895) internal successors, (11877), 8787 states have internal predecessors, (11877), 2523 states have call successors, (2523), 1113 states have call predecessors, (2523), 1184 states have return successors, (2965), 2536 states have call predecessors, (2965), 2522 states have call successors, (2965) [2022-12-14 05:01:40,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12255 states to 12255 states and 17365 transitions. [2022-12-14 05:01:40,193 INFO L78 Accepts]: Start accepts. Automaton has 12255 states and 17365 transitions. Word has length 165 [2022-12-14 05:01:40,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:01:40,193 INFO L495 AbstractCegarLoop]: Abstraction has 12255 states and 17365 transitions. [2022-12-14 05:01:40,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 05:01:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 12255 states and 17365 transitions. [2022-12-14 05:01:40,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-12-14 05:01:40,205 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:01:40,205 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:40,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 05:01:40,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:01:40,407 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:01:40,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:01:40,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1084658991, now seen corresponding path program 1 times [2022-12-14 05:01:40,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:01:40,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601659149] [2022-12-14 05:01:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:01:40,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:01:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:01:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-12-14 05:01:41,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:01:41,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601659149] [2022-12-14 05:01:41,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601659149] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:01:41,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342699873] [2022-12-14 05:01:41,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:01:41,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:01:41,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:01:41,138 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:01:41,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ed2d369-9f8a-448a-95c3-14cddc4960a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:01:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:01:41,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 2007 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 05:01:41,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:01:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 91 proven. 5 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-12-14 05:01:41,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:01:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-12-14 05:01:42,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342699873] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:01:42,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1192216924] [2022-12-14 05:01:42,219 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2022-12-14 05:01:42,219 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:01:42,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:01:42,220 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:01:42,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:01:42,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 195 [2022-12-14 05:01:42,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 197 [2022-12-14 05:01:42,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:42,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:42,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:42,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:42,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:42,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:42,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:42,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:42,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 33 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2022-12-14 05:01:42,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:42,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:42,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:42,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:42,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:42,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:42,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:42,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:42,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 33 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2022-12-14 05:01:55,438 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-12-14 05:01:55,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-12-14 05:01:55,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-12-14 05:01:55,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 05:01:55,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 05:01:56,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 05:01:56,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 05:01:56,654 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 05:01:59,915 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-12-14 05:01:59,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-12-14 05:01:59,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-12-14 05:02:00,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 05:02:00,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 05:02:00,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 05:02:00,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 05:02:01,102 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 05:02:01,739 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 118 for LOIs [2022-12-14 05:02:01,796 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 114 for LOIs [2022-12-14 05:02:01,854 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:02:33,536 WARN L233 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 597 DAG size of output: 504 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:03:12,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1192216924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:03:12,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:03:12,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [9, 6, 6] total 70 [2022-12-14 05:03:12,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118739817] [2022-12-14 05:03:12,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:03:12,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 05:03:12,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:03:12,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 05:03:12,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=4298, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 05:03:12,854 INFO L87 Difference]: Start difference. First operand 12255 states and 17365 transitions. Second operand has 57 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 41 states have internal predecessors, (78), 14 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 14 states have call predecessors, (25), 14 states have call successors, (25)