./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 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/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_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur --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-38b53e6 [2022-11-26 00:34:13,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:34:13,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:34:14,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:34:14,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:34:14,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:34:14,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:34:14,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:34:14,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:34:14,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:34:14,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:34:14,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:34:14,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:34:14,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:34:14,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:34:14,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:34:14,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:34:14,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:34:14,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:34:14,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:34:14,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:34:14,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:34:14,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:34:14,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:34:14,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:34:14,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:34:14,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:34:14,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:34:14,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:34:14,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:34:14,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:34:14,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:34:14,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:34:14,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:34:14,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:34:14,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:34:14,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:34:14,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:34:14,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:34:14,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:34:14,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:34:14,067 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-26 00:34:14,106 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:34:14,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:34:14,108 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:34:14,108 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:34:14,109 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:34:14,109 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:34:14,109 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:34:14,110 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:34:14,110 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:34:14,110 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:34:14,111 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:34:14,111 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:34:14,112 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:34:14,112 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:34:14,112 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:34:14,112 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:34:14,113 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:34:14,113 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:34:14,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:34:14,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:34:14,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:34:14,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:34:14,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:34:14,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:34:14,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:34:14,116 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:34:14,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:34:14,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:34:14,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:34:14,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:34:14,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:34:14,118 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:34:14,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:34:14,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:34:14,119 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:34:14,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:34:14,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:34:14,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:34:14,120 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_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2022-11-26 00:34:14,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:34:14,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:34:14,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:34:14,462 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:34:14,463 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:34:14,464 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/../../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 [2022-11-26 00:34:17,471 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:34:18,089 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:34:18,091 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/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 [2022-11-26 00:34:18,134 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/data/e32ec141a/b47eb188c93c456589a68a68a00fcf80/FLAGadc0d630b [2022-11-26 00:34:18,160 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/data/e32ec141a/b47eb188c93c456589a68a68a00fcf80 [2022-11-26 00:34:18,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:34:18,169 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:34:18,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:34:18,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:34:18,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:34:18,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:34:18" (1/1) ... [2022-11-26 00:34:18,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da17bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:18, skipping insertion in model container [2022-11-26 00:34:18,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:34:18" (1/1) ... [2022-11-26 00:34:18,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:34:18,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:34:19,171 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_bh [2022-11-26 00:34:19,179 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irq [2022-11-26 00:34:19,185 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_unlock_bh [2022-11-26 00:34:19,191 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_unlock_irq [2022-11-26 00:34:19,198 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_unlock_irqrestore [2022-11-26 00:34:19,223 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-26 00:34:19,275 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:19,277 WARN L623 FunctionHandler]: Unknown extern function _copy_from_user [2022-11-26 00:34:19,278 WARN L623 FunctionHandler]: Unknown extern function _copy_from_user [2022-11-26 00:34:19,279 WARN L623 FunctionHandler]: Unknown extern function __copy_from_user_overflow [2022-11-26 00:34:19,286 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:19,287 WARN L623 FunctionHandler]: Unknown extern function _copy_to_user [2022-11-26 00:34:19,287 WARN L623 FunctionHandler]: Unknown extern function _copy_to_user [2022-11-26 00:34:19,288 WARN L623 FunctionHandler]: Unknown extern function __copy_to_user_overflow [2022-11-26 00:34:19,366 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-11-26 00:34:19,516 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_e94c965c-84d2-40ce-a9ad-01b56375cfe1/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] [2022-11-26 00:34:19,556 WARN L623 FunctionHandler]: Unknown extern function lockdep_init_map [2022-11-26 00:34:19,598 WARN L623 FunctionHandler]: Unknown extern function tty_termios_baud_rate [2022-11-26 00:34:19,634 WARN L623 FunctionHandler]: Unknown extern function __tasklet_schedule [2022-11-26 00:34:19,759 WARN L623 FunctionHandler]: Unknown extern function _raw_read_lock [2022-11-26 00:34:19,763 WARN L623 FunctionHandler]: Unknown extern function _raw_read_unlock [2022-11-26 00:34:19,772 WARN L623 FunctionHandler]: Unknown extern function up [2022-11-26 00:34:19,781 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-11-26 00:34:19,783 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-11-26 00:34:19,788 WARN L623 FunctionHandler]: Unknown extern function tasklet_init [2022-11-26 00:34:19,794 WARN L623 FunctionHandler]: Unknown extern function ppp_register_channel [2022-11-26 00:34:19,795 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 00:34:19,806 WARN L623 FunctionHandler]: Unknown extern function _raw_write_lock_irq [2022-11-26 00:34:19,808 WARN L623 FunctionHandler]: Unknown extern function _raw_write_unlock_irq [2022-11-26 00:34:19,809 WARN L623 FunctionHandler]: Unknown extern function down [2022-11-26 00:34:19,809 WARN L623 FunctionHandler]: Unknown extern function tasklet_kill [2022-11-26 00:34:19,810 WARN L623 FunctionHandler]: Unknown extern function ppp_unregister_channel [2022-11-26 00:34:19,810 WARN L623 FunctionHandler]: Unknown extern function skb_queue_purge [2022-11-26 00:34:19,811 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 00:34:19,832 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:19,832 WARN L623 FunctionHandler]: Unknown extern function ppp_channel_index [2022-11-26 00:34:19,842 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:19,843 WARN L623 FunctionHandler]: Unknown extern function ppp_unit_number [2022-11-26 00:34:19,847 WARN L623 FunctionHandler]: Unknown extern function n_tty_ioctl_helper [2022-11-26 00:34:19,848 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:19,850 WARN L623 FunctionHandler]: Unknown extern function tty_mode_ioctl [2022-11-26 00:34:19,861 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irqsave [2022-11-26 00:34:19,863 WARN L623 FunctionHandler]: Unknown extern function tty_unthrottle [2022-11-26 00:34:19,873 WARN L623 FunctionHandler]: Unknown extern function tty_register_ldisc [2022-11-26 00:34:19,874 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 00:34:19,883 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:19,884 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:19,885 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:19,889 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:19,890 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:19,896 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:19,901 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:19,903 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:19,909 WARN L623 FunctionHandler]: Unknown extern function ppp_input_error [2022-11-26 00:34:19,910 WARN L623 FunctionHandler]: Unknown extern function ppp_input [2022-11-26 00:34:19,916 WARN L623 FunctionHandler]: Unknown extern function ppp_output_wakeup [2022-11-26 00:34:19,958 WARN L623 FunctionHandler]: Unknown extern function ppp_output_wakeup [2022-11-26 00:34:19,970 WARN L623 FunctionHandler]: Unknown extern function skb_trim [2022-11-26 00:34:19,972 WARN L623 FunctionHandler]: Unknown extern function skb_pull [2022-11-26 00:34:19,973 WARN L623 FunctionHandler]: Unknown extern function skb_push [2022-11-26 00:34:19,974 WARN L623 FunctionHandler]: Unknown extern function skb_queue_tail [2022-11-26 00:34:19,976 WARN L623 FunctionHandler]: Unknown extern function skb_trim [2022-11-26 00:34:19,994 WARN L623 FunctionHandler]: Unknown extern function skb_put [2022-11-26 00:34:20,004 WARN L623 FunctionHandler]: Unknown extern function start_tty [2022-11-26 00:34:20,010 WARN L623 FunctionHandler]: Unknown extern function stop_tty [2022-11-26 00:34:20,013 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 00:34:20,022 WARN L623 FunctionHandler]: Unknown extern function tty_unregister_ldisc [2022-11-26 00:34:20,026 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 00:34:20,054 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,055 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,056 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,056 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,057 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,057 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,058 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,059 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_alloc [2022-11-26 00:34:20,059 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,060 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,061 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,062 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_alloc [2022-11-26 00:34:20,117 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_alloc [2022-11-26 00:34:20,126 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-26 00:34:20,127 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-26 00:34:20,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:34:20,160 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:34:20,324 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_bh [2022-11-26 00:34:20,325 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irq [2022-11-26 00:34:20,325 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_unlock_bh [2022-11-26 00:34:20,326 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_unlock_irq [2022-11-26 00:34:20,326 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_unlock_irqrestore [2022-11-26 00:34:20,327 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-26 00:34:20,328 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:20,328 WARN L623 FunctionHandler]: Unknown extern function _copy_from_user [2022-11-26 00:34:20,329 WARN L623 FunctionHandler]: Unknown extern function _copy_from_user [2022-11-26 00:34:20,329 WARN L623 FunctionHandler]: Unknown extern function __copy_from_user_overflow [2022-11-26 00:34:20,330 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:20,331 WARN L623 FunctionHandler]: Unknown extern function _copy_to_user [2022-11-26 00:34:20,331 WARN L623 FunctionHandler]: Unknown extern function _copy_to_user [2022-11-26 00:34:20,332 WARN L623 FunctionHandler]: Unknown extern function __copy_to_user_overflow [2022-11-26 00:34:20,335 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-11-26 00:34:20,340 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_e94c965c-84d2-40ce-a9ad-01b56375cfe1/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] [2022-11-26 00:34:20,353 WARN L623 FunctionHandler]: Unknown extern function lockdep_init_map [2022-11-26 00:34:20,356 WARN L623 FunctionHandler]: Unknown extern function tty_termios_baud_rate [2022-11-26 00:34:20,357 WARN L623 FunctionHandler]: Unknown extern function __tasklet_schedule [2022-11-26 00:34:20,361 WARN L623 FunctionHandler]: Unknown extern function _raw_read_lock [2022-11-26 00:34:20,363 WARN L623 FunctionHandler]: Unknown extern function _raw_read_unlock [2022-11-26 00:34:20,364 WARN L623 FunctionHandler]: Unknown extern function up [2022-11-26 00:34:20,366 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-11-26 00:34:20,369 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-11-26 00:34:20,371 WARN L623 FunctionHandler]: Unknown extern function tasklet_init [2022-11-26 00:34:20,372 WARN L623 FunctionHandler]: Unknown extern function ppp_register_channel [2022-11-26 00:34:20,373 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 00:34:20,374 WARN L623 FunctionHandler]: Unknown extern function _raw_write_lock_irq [2022-11-26 00:34:20,375 WARN L623 FunctionHandler]: Unknown extern function _raw_write_unlock_irq [2022-11-26 00:34:20,376 WARN L623 FunctionHandler]: Unknown extern function down [2022-11-26 00:34:20,377 WARN L623 FunctionHandler]: Unknown extern function tasklet_kill [2022-11-26 00:34:20,378 WARN L623 FunctionHandler]: Unknown extern function ppp_unregister_channel [2022-11-26 00:34:20,378 WARN L623 FunctionHandler]: Unknown extern function skb_queue_purge [2022-11-26 00:34:20,379 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 00:34:20,382 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:20,383 WARN L623 FunctionHandler]: Unknown extern function ppp_channel_index [2022-11-26 00:34:20,384 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:20,384 WARN L623 FunctionHandler]: Unknown extern function ppp_unit_number [2022-11-26 00:34:20,385 WARN L623 FunctionHandler]: Unknown extern function n_tty_ioctl_helper [2022-11-26 00:34:20,386 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:20,386 WARN L623 FunctionHandler]: Unknown extern function tty_mode_ioctl [2022-11-26 00:34:20,390 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irqsave [2022-11-26 00:34:20,392 WARN L623 FunctionHandler]: Unknown extern function tty_unthrottle [2022-11-26 00:34:20,395 WARN L623 FunctionHandler]: Unknown extern function tty_register_ldisc [2022-11-26 00:34:20,395 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 00:34:20,397 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:20,398 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:20,399 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:20,400 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:20,400 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:20,401 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:20,404 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:20,405 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-26 00:34:20,406 WARN L623 FunctionHandler]: Unknown extern function ppp_input_error [2022-11-26 00:34:20,407 WARN L623 FunctionHandler]: Unknown extern function ppp_input [2022-11-26 00:34:20,408 WARN L623 FunctionHandler]: Unknown extern function ppp_output_wakeup [2022-11-26 00:34:20,433 WARN L623 FunctionHandler]: Unknown extern function ppp_output_wakeup [2022-11-26 00:34:20,438 WARN L623 FunctionHandler]: Unknown extern function skb_trim [2022-11-26 00:34:20,441 WARN L623 FunctionHandler]: Unknown extern function skb_pull [2022-11-26 00:34:20,442 WARN L623 FunctionHandler]: Unknown extern function skb_push [2022-11-26 00:34:20,444 WARN L623 FunctionHandler]: Unknown extern function skb_queue_tail [2022-11-26 00:34:20,447 WARN L623 FunctionHandler]: Unknown extern function skb_trim [2022-11-26 00:34:20,468 WARN L623 FunctionHandler]: Unknown extern function skb_put [2022-11-26 00:34:20,470 WARN L623 FunctionHandler]: Unknown extern function start_tty [2022-11-26 00:34:20,475 WARN L623 FunctionHandler]: Unknown extern function stop_tty [2022-11-26 00:34:20,478 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 00:34:20,489 WARN L623 FunctionHandler]: Unknown extern function tty_unregister_ldisc [2022-11-26 00:34:20,498 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 00:34:20,505 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,505 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,506 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,507 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,507 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,507 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,508 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,508 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_alloc [2022-11-26 00:34:20,509 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,509 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,509 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_free [2022-11-26 00:34:20,510 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_alloc [2022-11-26 00:34:20,516 WARN L623 FunctionHandler]: Unknown extern function ldv_skb_alloc [2022-11-26 00:34:20,527 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-26 00:34:20,529 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-26 00:34:20,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:34:20,623 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:34:20,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:20 WrapperNode [2022-11-26 00:34:20,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:34:20,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:34:20,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:34:20,626 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:34:20,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:20" (1/1) ... [2022-11-26 00:34:20,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:20" (1/1) ... [2022-11-26 00:34:20,786 INFO L138 Inliner]: procedures = 180, calls = 578, calls flagged for inlining = 99, calls inlined = 93, statements flattened = 2411 [2022-11-26 00:34:20,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:34:20,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:34:20,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:34:20,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:34:20,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:20" (1/1) ... [2022-11-26 00:34:20,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:20" (1/1) ... [2022-11-26 00:34:20,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:20" (1/1) ... [2022-11-26 00:34:20,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:20" (1/1) ... [2022-11-26 00:34:20,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:20" (1/1) ... [2022-11-26 00:34:20,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:20" (1/1) ... [2022-11-26 00:34:20,942 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:20" (1/1) ... [2022-11-26 00:34:20,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:20" (1/1) ... [2022-11-26 00:34:21,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:34:21,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:34:21,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:34:21,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:34:21,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:20" (1/1) ... [2022-11-26 00:34:21,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:34:21,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:21,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:34:21,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:34:21,142 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-26 00:34:21,142 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-26 00:34:21,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-26 00:34:21,143 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_push [2022-11-26 00:34:21,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_push [2022-11-26 00:34:21,143 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2022-11-26 00:34:21,143 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2022-11-26 00:34:21,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-26 00:34:21,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-26 00:34:21,144 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-26 00:34:21,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-26 00:34:21,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:34:21,144 INFO L130 BoogieDeclarations]: Found specification of procedure crc_ccitt_byte [2022-11-26 00:34:21,145 INFO L138 BoogieDeclarations]: Found implementation of procedure crc_ccitt_byte [2022-11-26 00:34:21,145 INFO L130 BoogieDeclarations]: Found specification of procedure ap_put [2022-11-26 00:34:21,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_put [2022-11-26 00:34:21,145 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_output_wakeup [2022-11-26 00:34:21,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_output_wakeup [2022-11-26 00:34:21,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-26 00:34:21,146 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-26 00:34:21,146 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-11-26 00:34:21,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-11-26 00:34:21,146 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-26 00:34:21,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-26 00:34:21,146 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_hangup [2022-11-26 00:34:21,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_hangup [2022-11-26 00:34:21,147 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-26 00:34:21,147 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-26 00:34:21,147 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2022-11-26 00:34:21,147 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2022-11-26 00:34:21,148 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_be16 [2022-11-26 00:34:21,148 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_be16 [2022-11-26 00:34:21,148 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-11-26 00:34:21,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-11-26 00:34:21,148 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-26 00:34:21,148 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-26 00:34:21,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:34:21,149 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-26 00:34:21,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-26 00:34:21,149 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-26 00:34:21,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-26 00:34:21,149 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-26 00:34:21,150 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-26 00:34:21,150 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:34:21,150 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:34:21,150 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_close [2022-11-26 00:34:21,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_close [2022-11-26 00:34:21,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:34:21,151 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_poll [2022-11-26 00:34:21,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_poll [2022-11-26 00:34:21,151 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-26 00:34:21,151 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-26 00:34:21,151 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-26 00:34:21,152 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-26 00:34:21,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:34:21,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:34:21,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 00:34:21,152 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-11-26 00:34:21,152 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-11-26 00:34:21,153 INFO L130 BoogieDeclarations]: Found specification of procedure ap_get [2022-11-26 00:34:21,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_get [2022-11-26 00:34:21,153 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2022-11-26 00:34:21,154 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2022-11-26 00:34:21,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 00:34:21,154 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-11-26 00:34:21,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-11-26 00:34:21,154 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2022-11-26 00:34:21,155 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2022-11-26 00:34:21,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:34:21,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-26 00:34:21,155 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-26 00:34:21,155 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-26 00:34:21,155 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-26 00:34:21,157 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-26 00:34:21,160 INFO L130 BoogieDeclarations]: Found specification of procedure async_lcp_peek [2022-11-26 00:34:21,160 INFO L138 BoogieDeclarations]: Found implementation of procedure async_lcp_peek [2022-11-26 00:34:21,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:34:21,161 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-11-26 00:34:21,161 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-11-26 00:34:21,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-26 00:34:21,161 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-26 00:34:21,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-26 00:34:21,163 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-26 00:34:21,163 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-26 00:34:21,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:34:21,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:34:21,170 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_ioctl [2022-11-26 00:34:21,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_ioctl [2022-11-26 00:34:21,170 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-11-26 00:34:21,171 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-11-26 00:34:21,860 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:34:21,862 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:34:22,460 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-26 00:34:26,133 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:34:27,315 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:34:27,315 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-26 00:34:27,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:34:27 BoogieIcfgContainer [2022-11-26 00:34:27,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:34:27,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:34:27,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:34:27,326 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:34:27,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:34:18" (1/3) ... [2022-11-26 00:34:27,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23acf0a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:34:27, skipping insertion in model container [2022-11-26 00:34:27,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:20" (2/3) ... [2022-11-26 00:34:27,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23acf0a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:34:27, skipping insertion in model container [2022-11-26 00:34:27,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:34:27" (3/3) ... [2022-11-26 00:34:27,331 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 [2022-11-26 00:34:27,352 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:34:27,352 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:34:27,436 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:34:27,444 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;@742feaca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:34:27,444 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:34:27,452 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) [2022-11-26 00:34:27,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:34:27,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:27,469 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] [2022-11-26 00:34:27,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:27,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:27,477 INFO L85 PathProgramCache]: Analyzing trace with hash -362074703, now seen corresponding path program 1 times [2022-11-26 00:34:27,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:27,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139649231] [2022-11-26 00:34:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:27,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-26 00:34:28,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:28,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139649231] [2022-11-26 00:34:28,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139649231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:28,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:34:28,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:34:28,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863005066] [2022-11-26 00:34:28,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:28,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:34:28,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:28,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:34:28,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:34:28,048 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) [2022-11-26 00:34:31,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:34:31,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:31,408 INFO L93 Difference]: Finished difference Result 1364 states and 2015 transitions. [2022-11-26 00:34:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:34:31,411 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 [2022-11-26 00:34:31,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:31,430 INFO L225 Difference]: With dead ends: 1364 [2022-11-26 00:34:31,430 INFO L226 Difference]: Without dead ends: 899 [2022-11-26 00:34:31,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:34:31,440 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 626 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s 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, 3.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:31,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 1248 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 220 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-11-26 00:34:31,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-11-26 00:34:31,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 898. [2022-11-26 00:34:31,554 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) [2022-11-26 00:34:31,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1295 transitions. [2022-11-26 00:34:31,565 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1295 transitions. Word has length 71 [2022-11-26 00:34:31,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:31,566 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1295 transitions. [2022-11-26 00:34:31,566 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) [2022-11-26 00:34:31,567 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1295 transitions. [2022-11-26 00:34:31,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-26 00:34:31,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:31,577 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] [2022-11-26 00:34:31,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:34:31,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:31,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:31,579 INFO L85 PathProgramCache]: Analyzing trace with hash 175421533, now seen corresponding path program 1 times [2022-11-26 00:34:31,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:31,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961758446] [2022-11-26 00:34:31,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:31,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-26 00:34:31,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:31,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961758446] [2022-11-26 00:34:31,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961758446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:31,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:34:31,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:34:31,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248341230] [2022-11-26 00:34:31,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:31,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:34:31,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:31,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:34:31,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:34:31,903 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) [2022-11-26 00:34:36,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:34:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:36,351 INFO L93 Difference]: Finished difference Result 1773 states and 2585 transitions. [2022-11-26 00:34:36,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:34:36,352 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 [2022-11-26 00:34:36,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:36,366 INFO L225 Difference]: With dead ends: 1773 [2022-11-26 00:34:36,366 INFO L226 Difference]: Without dead ends: 1768 [2022-11-26 00:34:36,368 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 [2022-11-26 00:34:36,370 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 652 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1886 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:36,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 1886 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 334 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-11-26 00:34:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2022-11-26 00:34:36,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1759. [2022-11-26 00:34:36,491 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) [2022-11-26 00:34:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 2567 transitions. [2022-11-26 00:34:36,506 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 2567 transitions. Word has length 74 [2022-11-26 00:34:36,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:36,507 INFO L495 AbstractCegarLoop]: Abstraction has 1759 states and 2567 transitions. [2022-11-26 00:34:36,507 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) [2022-11-26 00:34:36,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 2567 transitions. [2022-11-26 00:34:36,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-26 00:34:36,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:36,516 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] [2022-11-26 00:34:36,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:34:36,516 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:36,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:36,517 INFO L85 PathProgramCache]: Analyzing trace with hash 737862488, now seen corresponding path program 1 times [2022-11-26 00:34:36,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:36,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618984186] [2022-11-26 00:34:36,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:36,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-11-26 00:34:36,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:36,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618984186] [2022-11-26 00:34:36,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618984186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:36,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:34:36,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:34:36,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134620412] [2022-11-26 00:34:36,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:36,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:34:36,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:36,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:34:36,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:34:36,806 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) [2022-11-26 00:34:40,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:34:40,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:40,155 INFO L93 Difference]: Finished difference Result 4344 states and 6311 transitions. [2022-11-26 00:34:40,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:34:40,156 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 [2022-11-26 00:34:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:40,170 INFO L225 Difference]: With dead ends: 4344 [2022-11-26 00:34:40,171 INFO L226 Difference]: Without dead ends: 2606 [2022-11-26 00:34:40,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:34:40,178 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, 3.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:40,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 1122 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 240 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-11-26 00:34:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2022-11-26 00:34:40,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2599. [2022-11-26 00:34:40,299 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) [2022-11-26 00:34:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 3765 transitions. [2022-11-26 00:34:40,318 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 3765 transitions. Word has length 114 [2022-11-26 00:34:40,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:40,318 INFO L495 AbstractCegarLoop]: Abstraction has 2599 states and 3765 transitions. [2022-11-26 00:34:40,319 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) [2022-11-26 00:34:40,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 3765 transitions. [2022-11-26 00:34:40,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-26 00:34:40,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:40,326 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] [2022-11-26 00:34:40,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:34:40,327 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:40,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:40,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1376704315, now seen corresponding path program 1 times [2022-11-26 00:34:40,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:40,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761405309] [2022-11-26 00:34:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:40,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-11-26 00:34:40,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:40,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761405309] [2022-11-26 00:34:40,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761405309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:40,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:34:40,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:34:40,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941303846] [2022-11-26 00:34:40,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:40,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:34:40,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:40,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:34:40,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:34:40,513 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) [2022-11-26 00:34:44,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:34:44,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:44,186 INFO L93 Difference]: Finished difference Result 6435 states and 9288 transitions. [2022-11-26 00:34:44,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:34:44,187 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 [2022-11-26 00:34:44,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:44,211 INFO L225 Difference]: With dead ends: 6435 [2022-11-26 00:34:44,211 INFO L226 Difference]: Without dead ends: 3857 [2022-11-26 00:34:44,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:34:44,221 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 448 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s 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, 3.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:44,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1390 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-11-26 00:34:44,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2022-11-26 00:34:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 3851. [2022-11-26 00:34:44,418 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) [2022-11-26 00:34:44,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3851 states to 3851 states and 5541 transitions. [2022-11-26 00:34:44,453 INFO L78 Accepts]: Start accepts. Automaton has 3851 states and 5541 transitions. Word has length 146 [2022-11-26 00:34:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:44,453 INFO L495 AbstractCegarLoop]: Abstraction has 3851 states and 5541 transitions. [2022-11-26 00:34:44,454 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) [2022-11-26 00:34:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3851 states and 5541 transitions. [2022-11-26 00:34:44,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-26 00:34:44,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:44,463 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] [2022-11-26 00:34:44,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:34:44,464 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:44,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:44,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1394467334, now seen corresponding path program 1 times [2022-11-26 00:34:44,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:44,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103502064] [2022-11-26 00:34:44,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:44,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-26 00:34:44,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:44,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103502064] [2022-11-26 00:34:44,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103502064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:44,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:34:44,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:34:44,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037037453] [2022-11-26 00:34:44,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:44,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:34:44,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:44,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:34:44,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:34:44,690 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) [2022-11-26 00:34:48,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:34:48,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:48,227 INFO L93 Difference]: Finished difference Result 9392 states and 13441 transitions. [2022-11-26 00:34:48,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:34:48,237 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 [2022-11-26 00:34:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:48,274 INFO L225 Difference]: With dead ends: 9392 [2022-11-26 00:34:48,274 INFO L226 Difference]: Without dead ends: 5570 [2022-11-26 00:34:48,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:34:48,293 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 447 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s 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, 3.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:48,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 1161 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-11-26 00:34:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2022-11-26 00:34:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 5463. [2022-11-26 00:34:48,645 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) [2022-11-26 00:34:48,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 7717 transitions. [2022-11-26 00:34:48,673 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 7717 transitions. Word has length 141 [2022-11-26 00:34:48,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:48,674 INFO L495 AbstractCegarLoop]: Abstraction has 5463 states and 7717 transitions. [2022-11-26 00:34:48,674 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) [2022-11-26 00:34:48,674 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 7717 transitions. [2022-11-26 00:34:48,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-26 00:34:48,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:48,687 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] [2022-11-26 00:34:48,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:34:48,688 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:48,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:48,688 INFO L85 PathProgramCache]: Analyzing trace with hash -115269721, now seen corresponding path program 1 times [2022-11-26 00:34:48,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:48,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38224151] [2022-11-26 00:34:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:48,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-11-26 00:34:49,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:49,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38224151] [2022-11-26 00:34:49,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38224151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:49,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:34:49,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:34:49,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115225737] [2022-11-26 00:34:49,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:49,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:34:49,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:49,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:34:49,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:34:49,171 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) [2022-11-26 00:34:52,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:34:53,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:53,035 INFO L93 Difference]: Finished difference Result 8208 states and 11643 transitions. [2022-11-26 00:34:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:34:53,036 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 [2022-11-26 00:34:53,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:53,085 INFO L225 Difference]: With dead ends: 8208 [2022-11-26 00:34:53,085 INFO L226 Difference]: Without dead ends: 8203 [2022-11-26 00:34:53,091 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 [2022-11-26 00:34:53,094 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 625 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:53,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 1894 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 333 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-11-26 00:34:53,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2022-11-26 00:34:53,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8169. [2022-11-26 00:34:53,609 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) [2022-11-26 00:34:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8169 states to 8169 states and 11582 transitions. [2022-11-26 00:34:53,640 INFO L78 Accepts]: Start accepts. Automaton has 8169 states and 11582 transitions. Word has length 135 [2022-11-26 00:34:53,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:53,641 INFO L495 AbstractCegarLoop]: Abstraction has 8169 states and 11582 transitions. [2022-11-26 00:34:53,642 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) [2022-11-26 00:34:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 8169 states and 11582 transitions. [2022-11-26 00:34:53,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-26 00:34:53,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:53,652 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] [2022-11-26 00:34:53,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:34:53,653 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:53,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:53,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1236956662, now seen corresponding path program 1 times [2022-11-26 00:34:53,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:53,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812228808] [2022-11-26 00:34:53,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:53,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-11-26 00:34:53,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:53,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812228808] [2022-11-26 00:34:53,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812228808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:53,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:34:53,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:34:53,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491487150] [2022-11-26 00:34:53,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:53,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:34:53,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:53,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:34:53,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:34:53,781 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) [2022-11-26 00:34:57,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:34:57,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:57,384 INFO L93 Difference]: Finished difference Result 10964 states and 15756 transitions. [2022-11-26 00:34:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:34:57,392 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 [2022-11-26 00:34:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:57,465 INFO L225 Difference]: With dead ends: 10964 [2022-11-26 00:34:57,466 INFO L226 Difference]: Without dead ends: 8219 [2022-11-26 00:34:57,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:34:57,484 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 4 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s 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, 3.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:57,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1126 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-11-26 00:34:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8219 states. [2022-11-26 00:34:57,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8219 to 8219. [2022-11-26 00:34:57,993 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) [2022-11-26 00:34:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8219 states to 8219 states and 11632 transitions. [2022-11-26 00:34:58,032 INFO L78 Accepts]: Start accepts. Automaton has 8219 states and 11632 transitions. Word has length 145 [2022-11-26 00:34:58,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:58,032 INFO L495 AbstractCegarLoop]: Abstraction has 8219 states and 11632 transitions. [2022-11-26 00:34:58,033 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) [2022-11-26 00:34:58,033 INFO L276 IsEmpty]: Start isEmpty. Operand 8219 states and 11632 transitions. [2022-11-26 00:34:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-26 00:34:58,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:58,046 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] [2022-11-26 00:34:58,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:34:58,046 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:58,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:58,047 INFO L85 PathProgramCache]: Analyzing trace with hash 77298234, now seen corresponding path program 1 times [2022-11-26 00:34:58,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:58,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025561256] [2022-11-26 00:34:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:58,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-11-26 00:34:58,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:58,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025561256] [2022-11-26 00:34:58,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025561256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:58,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162570945] [2022-11-26 00:34:58,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:58,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:58,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:58,790 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:58,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:34:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:59,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:34:59,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 89 proven. 5 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-26 00:34:59,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:35:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-11-26 00:35:01,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162570945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:35:01,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542740083] [2022-11-26 00:35:01,270 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2022-11-26 00:35:01,270 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:35:01,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:35:01,279 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:35:01,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:35:01,613 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 [2022-11-26 00:35:01,706 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 [2022-11-26 00:35:02,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:02,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:02,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:02,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:02,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:02,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:02,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:02,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:02,228 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 [2022-11-26 00:35:02,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:02,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:02,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:02,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:02,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:02,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:02,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:02,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:02,612 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 [2022-11-26 00:35:15,175 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 [2022-11-26 00:35:15,184 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 [2022-11-26 00:35:15,192 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 [2022-11-26 00:35:15,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:35:15,487 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 [2022-11-26 00:35:15,519 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:35:15,519 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 [2022-11-26 00:35:15,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:35:15,757 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 [2022-11-26 00:35:15,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:35:15,788 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 [2022-11-26 00:35:16,098 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 [2022-11-26 00:35:16,105 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 [2022-11-26 00:35:16,125 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 [2022-11-26 00:35:16,132 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 [2022-11-26 00:35:16,146 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 [2022-11-26 00:35:38,826 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 117 for LOIs [2022-11-26 00:35:38,889 INFO L197 IcfgInterpreter]: Interpreting procedure ppp_asynctty_hangup with input of size 125 for LOIs [2022-11-26 00:35:39,246 INFO L197 IcfgInterpreter]: Interpreting procedure ppp_asynctty_close with input of size 125 for LOIs [2022-11-26 00:35:39,357 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 [2022-11-26 00:35:39,372 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 [2022-11-26 00:35:39,411 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 [2022-11-26 00:35:39,558 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 [2022-11-26 00:35:39,593 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 [2022-11-26 00:35:39,606 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 [2022-11-26 00:35:39,949 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 [2022-11-26 00:35:39,973 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 [2022-11-26 00:35:40,094 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 [2022-11-26 00:35:40,127 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 [2022-11-26 00:35:40,515 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 [2022-11-26 00:35:40,556 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 [2022-11-26 00:35:40,862 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 [2022-11-26 00:35:40,906 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 [2022-11-26 00:35:42,061 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 [2022-11-26 00:35:42,085 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 [2022-11-26 00:35:42,133 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 [2022-11-26 00:35:42,148 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_skb_free with input of size 144 for LOIs [2022-11-26 00:35:43,040 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_set_remove with input of size 147 for LOIs [2022-11-26 00:35:43,537 INFO L197 IcfgInterpreter]: Interpreting procedure kfree with input of size 70 for LOIs [2022-11-26 00:35:43,546 INFO L197 IcfgInterpreter]: Interpreting procedure atomic_dec_and_test with input of size 125 for LOIs [2022-11-26 00:35:43,565 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_error with input of size 107 for LOIs [2022-11-26 00:35:43,581 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:41:34,045 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) [2022-11-26 00:44:23,234 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) [2022-11-26 00:46:28,516 WARN L233 SmtUtils]: Spent 2.02m 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) [2022-11-26 00:47:04,691 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 [2022-11-26 00:47:04,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:47:04,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:47:04,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2022-11-26 00:47:04,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105331581] [2022-11-26 00:47:04,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:47:04,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:47:04,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:04,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:47:04,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=6688, Unknown=0, NotChecked=0, Total=7310 [2022-11-26 00:47:04,697 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) [2022-11-26 00:47:12,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:47:19,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:47:19,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:19,902 INFO L93 Difference]: Finished difference Result 18644 states and 26464 transitions. [2022-11-26 00:47:19,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:47:19,902 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 [2022-11-26 00:47:19,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:19,961 INFO L225 Difference]: With dead ends: 18644 [2022-11-26 00:47:19,961 INFO L226 Difference]: Without dead ends: 10454 [2022-11-26 00:47:19,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 355 SyntacticMatches, 17 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 681.5s TimeCoverageRelationStatistics Valid=697, Invalid=7859, Unknown=0, NotChecked=0, Total=8556 [2022-11-26 00:47:19,996 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 2285 mSDsluCounter, 2242 mSDsCounter, 0 mSdLazyCounter, 3801 mSolverCounterSat, 1325 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2377 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 5127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1325 IncrementalHoareTripleChecker+Valid, 3801 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:19,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2377 Valid, 2793 Invalid, 5127 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1325 Valid, 3801 Invalid, 1 Unknown, 0 Unchecked, 14.3s Time] [2022-11-26 00:47:20,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10454 states. [2022-11-26 00:47:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10454 to 10235. [2022-11-26 00:47:20,511 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) [2022-11-26 00:47:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10235 states to 10235 states and 14444 transitions. [2022-11-26 00:47:20,558 INFO L78 Accepts]: Start accepts. Automaton has 10235 states and 14444 transitions. Word has length 146 [2022-11-26 00:47:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:20,559 INFO L495 AbstractCegarLoop]: Abstraction has 10235 states and 14444 transitions. [2022-11-26 00:47:20,559 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) [2022-11-26 00:47:20,559 INFO L276 IsEmpty]: Start isEmpty. Operand 10235 states and 14444 transitions. [2022-11-26 00:47:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-26 00:47:20,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:20,584 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] [2022-11-26 00:47:20,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:47:20,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:47:20,795 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:47:20,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:20,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2093734625, now seen corresponding path program 1 times [2022-11-26 00:47:20,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:20,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844611156] [2022-11-26 00:47:20,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:20,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-11-26 00:47:21,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:21,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844611156] [2022-11-26 00:47:21,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844611156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:47:21,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:47:21,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:47:21,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223350948] [2022-11-26 00:47:21,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:47:21,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:47:21,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:21,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:47:21,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:47:21,414 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) [2022-11-26 00:47:25,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:47:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:25,748 INFO L93 Difference]: Finished difference Result 20527 states and 28986 transitions. [2022-11-26 00:47:25,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:47:25,756 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 [2022-11-26 00:47:25,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:25,800 INFO L225 Difference]: With dead ends: 20527 [2022-11-26 00:47:25,800 INFO L226 Difference]: Without dead ends: 10321 [2022-11-26 00:47:25,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:47:25,833 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 2 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s 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, 4.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:25,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2242 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 444 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-11-26 00:47:25,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10321 states. [2022-11-26 00:47:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10321 to 10283. [2022-11-26 00:47:26,291 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) [2022-11-26 00:47:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10283 states to 10283 states and 14495 transitions. [2022-11-26 00:47:26,330 INFO L78 Accepts]: Start accepts. Automaton has 10283 states and 14495 transitions. Word has length 161 [2022-11-26 00:47:26,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:26,331 INFO L495 AbstractCegarLoop]: Abstraction has 10283 states and 14495 transitions. [2022-11-26 00:47:26,331 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) [2022-11-26 00:47:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 10283 states and 14495 transitions. [2022-11-26 00:47:26,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-26 00:47:26,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:26,354 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] [2022-11-26 00:47:26,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:47:26,355 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:47:26,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:26,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1967550763, now seen corresponding path program 1 times [2022-11-26 00:47:26,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:26,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537486976] [2022-11-26 00:47:26,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:26,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2022-11-26 00:47:26,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:26,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537486976] [2022-11-26 00:47:26,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537486976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:47:26,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:47:26,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:47:26,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000453467] [2022-11-26 00:47:26,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:47:26,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:47:26,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:26,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:47:26,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:47:26,883 INFO L87 Difference]: Start difference. First operand 10283 states and 14495 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-26 00:47:31,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:47:31,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:31,647 INFO L93 Difference]: Finished difference Result 23580 states and 33519 transitions. [2022-11-26 00:47:31,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:47:31,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 165 [2022-11-26 00:47:31,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:31,712 INFO L225 Difference]: With dead ends: 23580 [2022-11-26 00:47:31,712 INFO L226 Difference]: Without dead ends: 13326 [2022-11-26 00:47:31,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:47:31,743 INFO L413 NwaCegarLoop]: 784 mSDtfsCounter, 596 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 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, 4.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:31,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 1514 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 576 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-26 00:47:31,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13326 states. [2022-11-26 00:47:32,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13326 to 12255. [2022-11-26 00:47:32,433 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) [2022-11-26 00:47:32,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12255 states to 12255 states and 17365 transitions. [2022-11-26 00:47:32,476 INFO L78 Accepts]: Start accepts. Automaton has 12255 states and 17365 transitions. Word has length 165 [2022-11-26 00:47:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:32,477 INFO L495 AbstractCegarLoop]: Abstraction has 12255 states and 17365 transitions. [2022-11-26 00:47:32,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-26 00:47:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 12255 states and 17365 transitions. [2022-11-26 00:47:32,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-26 00:47:32,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:32,504 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] [2022-11-26 00:47:32,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:47:32,504 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:47:32,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:32,505 INFO L85 PathProgramCache]: Analyzing trace with hash -154241187, now seen corresponding path program 1 times [2022-11-26 00:47:32,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:32,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934280773] [2022-11-26 00:47:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:32,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-11-26 00:47:33,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:33,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934280773] [2022-11-26 00:47:33,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934280773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:33,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541718451] [2022-11-26 00:47:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:33,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:33,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:47:33,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:47:33,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94c965c-84d2-40ce-a9ad-01b56375cfe1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:47:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:34,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 2007 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:47:34,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 91 proven. 5 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-11-26 00:47:34,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:47:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-11-26 00:47:35,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541718451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:47:35,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [212124982] [2022-11-26 00:47:35,613 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2022-11-26 00:47:35,613 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:47:35,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:47:35,614 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:47:35,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:47:35,869 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 [2022-11-26 00:47:35,935 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 [2022-11-26 00:47:36,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,316 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 [2022-11-26 00:47:36,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,539 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 [2022-11-26 00:47:50,118 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:47:50,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-26 00:47:50,193 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-26 00:47:50,193 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 [2022-11-26 00:47:50,793 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 [2022-11-26 00:47:50,864 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 [2022-11-26 00:47:51,191 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 [2022-11-26 00:47:51,235 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 [2022-11-26 00:47:51,836 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:55,649 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-26 00:47:55,649 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 [2022-11-26 00:47:55,745 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 [2022-11-26 00:47:56,227 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 [2022-11-26 00:47:56,288 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 [2022-11-26 00:47:56,619 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 [2022-11-26 00:47:56,699 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 [2022-11-26 00:47:57,499 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:58,508 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 118 for LOIs [2022-11-26 00:47:58,598 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 114 for LOIs [2022-11-26 00:47:58,692 INFO L180 IcfgInterpreter]: Interpretation finished