java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/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 -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 11:02:07,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 11:02:07,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 11:02:07,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-10 11:02:07,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-10 11:02:07,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-10 11:02:07,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-10 11:02:07,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-10 11:02:07,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-10 11:02:07,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-10 11:02:07,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-10 11:02:07,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-10 11:02:07,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-10 11:02:07,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-10 11:02:07,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-10 11:02:07,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-10 11:02:07,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-10 11:02:07,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-10 11:02:07,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-10 11:02:07,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-10 11:02:07,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-10 11:02:07,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-10 11:02:07,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-10 11:02:07,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-10 11:02:07,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-10 11:02:07,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-10 11:02:07,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-10 11:02:07,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-10 11:02:07,699 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-10 11:02:07,700 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-10 11:02:07,700 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 11:02:07,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 11:02:07,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 11:02:07,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 11:02:07,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 11:02:07,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 11:02:07,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 11:02:07,708 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 11:02:07,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 11:02:07,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 11:02:07,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 11:02:07,711 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-10 11:02:07,734 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 11:02:07,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 11:02:07,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 11:02:07,735 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 11:02:07,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 11:02:07,736 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 11:02:07,736 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 11:02:07,736 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 11:02:07,737 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 11:02:07,737 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 11:02:07,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 11:02:07,739 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 11:02:07,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 11:02:07,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 11:02:07,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 11:02:07,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 11:02:07,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 11:02:07,740 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 11:02:07,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 11:02:07,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 11:02:07,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 11:02:07,741 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 11:02:07,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 11:02:07,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 11:02:07,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 11:02:07,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 11:02:07,742 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 11:02:07,742 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 11:02:07,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 11:02:07,743 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 11:02:07,787 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 11:02:07,801 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 11:02:07,804 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 11:02:07,805 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 11:02:07,806 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 11:02:07,807 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2019-09-10 11:02:07,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e6502ce3/6de1b4a0dc9a44a98fa68fa43fdac39c/FLAG57bb3a5eb [2019-09-10 11:02:08,675 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 11:02:08,676 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2019-09-10 11:02:08,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e6502ce3/6de1b4a0dc9a44a98fa68fa43fdac39c/FLAG57bb3a5eb [2019-09-10 11:02:09,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e6502ce3/6de1b4a0dc9a44a98fa68fa43fdac39c [2019-09-10 11:02:09,217 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 11:02:09,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 11:02:09,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 11:02:09,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 11:02:09,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 11:02:09,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 11:02:09" (1/1) ... [2019-09-10 11:02:09,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ce90d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:02:09, skipping insertion in model container [2019-09-10 11:02:09,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 11:02:09" (1/1) ... [2019-09-10 11:02:09,234 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 11:02:09,375 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 11:02:11,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 11:02:11,154 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 11:02:11,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 11:02:11,720 INFO L192 MainTranslator]: Completed translation [2019-09-10 11:02:11,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:02:11 WrapperNode [2019-09-10 11:02:11,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 11:02:11,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 11:02:11,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 11:02:11,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 11:02:11,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:02:11" (1/1) ... [2019-09-10 11:02:11,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:02:11" (1/1) ... [2019-09-10 11:02:11,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:02:11" (1/1) ... [2019-09-10 11:02:11,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:02:11" (1/1) ... [2019-09-10 11:02:11,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:02:11" (1/1) ... [2019-09-10 11:02:11,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:02:11" (1/1) ... [2019-09-10 11:02:11,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:02:11" (1/1) ... [2019-09-10 11:02:11,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 11:02:11,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 11:02:11,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 11:02:11,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 11:02:11,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:02:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 11:02:12,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 11:02:12,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 11:02:12,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2019-09-10 11:02:12,039 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2019-09-10 11:02:12,039 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2019-09-10 11:02:12,039 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2019-09-10 11:02:12,040 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2019-09-10 11:02:12,040 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2019-09-10 11:02:12,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __arch_swab32 [2019-09-10 11:02:12,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2019-09-10 11:02:12,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2019-09-10 11:02:12,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __swab16p [2019-09-10 11:02:12,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __swab32p [2019-09-10 11:02:12,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __be32_to_cpup [2019-09-10 11:02:12,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __be16_to_cpup [2019-09-10 11:02:12,041 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2019-09-10 11:02:12,042 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2019-09-10 11:02:12,042 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2019-09-10 11:02:12,042 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2019-09-10 11:02:12,042 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2019-09-10 11:02:12,042 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2019-09-10 11:02:12,043 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2019-09-10 11:02:12,043 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2019-09-10 11:02:12,043 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2019-09-10 11:02:12,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2019-09-10 11:02:12,043 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2019-09-10 11:02:12,043 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2019-09-10 11:02:12,043 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2019-09-10 11:02:12,044 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2019-09-10 11:02:12,044 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_empty [2019-09-10 11:02:12,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_queue_head_init [2019-09-10 11:02:12,044 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_head_init [2019-09-10 11:02:12,044 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_is_nonlinear [2019-09-10 11:02:12,044 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headroom [2019-09-10 11:02:12,045 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tailroom [2019-09-10 11:02:12,045 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2019-09-10 11:02:12,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-09-10 11:02:12,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-09-10 11:02:12,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-09-10 11:02:12,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-09-10 11:02:12,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-09-10 11:02:12,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-09-10 11:02:12,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-09-10 11:02:12,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2019-09-10 11:02:12,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_trap [2019-09-10 11:02:12,046 INFO L138 BoogieDeclarations]: Found implementation of procedure sema_init [2019-09-10 11:02:12,046 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_get_baud_rate [2019-09-10 11:02:12,046 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2019-09-10 11:02:12,046 INFO L138 BoogieDeclarations]: Found implementation of procedure crc_ccitt_byte [2019-09-10 11:02:12,047 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_be16 [2019-09-10 11:02:12,047 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_be32 [2019-09-10 11:02:12,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_get [2019-09-10 11:02:12,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_put [2019-09-10 11:02:12,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_open [2019-09-10 11:02:12,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_close [2019-09-10 11:02:12,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_hangup [2019-09-10 11:02:12,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_read [2019-09-10 11:02:12,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_write [2019-09-10 11:02:12,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_ioctl [2019-09-10 11:02:12,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_poll [2019-09-10 11:02:12,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_receive [2019-09-10 11:02:12,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_wakeup [2019-09-10 11:02:12,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_init [2019-09-10 11:02:12,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_ioctl [2019-09-10 11:02:12,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_process [2019-09-10 11:02:12,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_encode [2019-09-10 11:02:12,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_send [2019-09-10 11:02:12,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_push [2019-09-10 11:02:12,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_flush_output [2019-09-10 11:02:12,050 INFO L138 BoogieDeclarations]: Found implementation of procedure scan_ordinary [2019-09-10 11:02:12,050 INFO L138 BoogieDeclarations]: Found implementation of procedure process_input_packet [2019-09-10 11:02:12,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_input [2019-09-10 11:02:12,050 INFO L138 BoogieDeclarations]: Found implementation of procedure async_lcp_peek [2019-09-10 11:02:12,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_cleanup [2019-09-10 11:02:12,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_ppp_channel_ops_2 [2019-09-10 11:02:12,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_target_type_1 [2019-09-10 11:02:12,051 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 11:02:12,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_consume_skb_5 [2019-09-10 11:02:12,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_6 [2019-09-10 11:02:12,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_7 [2019-09-10 11:02:12,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_8 [2019-09-10 11:02:12,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_11 [2019-09-10 11:02:12,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_12 [2019-09-10 11:02:12,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_13 [2019-09-10 11:02:12,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_dequeue_14 [2019-09-10 11:02:12,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_consume_skb_15 [2019-09-10 11:02:12,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_16 [2019-09-10 11:02:12,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_17 [2019-09-10 11:02:12,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_18 [2019-09-10 11:02:12,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_init [2019-09-10 11:02:12,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_add [2019-09-10 11:02:12,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2019-09-10 11:02:12,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_contains [2019-09-10 11:02:12,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_is_empty [2019-09-10 11:02:12,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2019-09-10 11:02:12,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2019-09-10 11:02:12,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2019-09-10 11:02:12,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2019-09-10 11:02:12,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2019-09-10 11:02:12,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-09-10 11:02:12,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2019-09-10 11:02:12,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2019-09-10 11:02:12,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb [2019-09-10 11:02:12,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_netdev_alloc_skb [2019-09-10 11:02:12,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_current [2019-09-10 11:02:12,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-09-10 11:02:12,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_from_user_overflow [2019-09-10 11:02:12,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_to_user_overflow [2019-09-10 11:02:12,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2019-09-10 11:02:12,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __tasklet_schedule [2019-09-10 11:02:12,056 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2019-09-10 11:02:12,056 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2019-09-10 11:02:12,056 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_read_lock [2019-09-10 11:02:12,056 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_read_unlock [2019-09-10 11:02:12,056 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_bh [2019-09-10 11:02:12,057 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irq [2019-09-10 11:02:12,057 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2019-09-10 11:02:12,057 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_unlock_bh [2019-09-10 11:02:12,057 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_unlock_irq [2019-09-10 11:02:12,057 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_unlock_irqrestore [2019-09-10 11:02:12,057 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_lock_irq [2019-09-10 11:02:12,057 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock_irq [2019-09-10 11:02:12,058 INFO L138 BoogieDeclarations]: Found implementation of procedure down [2019-09-10 11:02:12,058 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2019-09-10 11:02:12,058 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2019-09-10 11:02:12,058 INFO L138 BoogieDeclarations]: Found implementation of procedure n_tty_ioctl_helper [2019-09-10 11:02:12,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_channel_index [2019-09-10 11:02:12,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_input [2019-09-10 11:02:12,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_input_error [2019-09-10 11:02:12,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_output_wakeup [2019-09-10 11:02:12,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_register_channel [2019-09-10 11:02:12,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_unit_number [2019-09-10 11:02:12,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_unregister_channel [2019-09-10 11:02:12,059 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-09-10 11:02:12,059 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2019-09-10 11:02:12,060 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2019-09-10 11:02:12,060 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2019-09-10 11:02:12,060 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_purge [2019-09-10 11:02:12,060 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2019-09-10 11:02:12,060 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2019-09-10 11:02:12,060 INFO L138 BoogieDeclarations]: Found implementation of procedure start_tty [2019-09-10 11:02:12,060 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_tty [2019-09-10 11:02:12,060 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_init [2019-09-10 11:02:12,061 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_kill [2019-09-10 11:02:12,061 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_mode_ioctl [2019-09-10 11:02:12,061 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_register_ldisc [2019-09-10 11:02:12,061 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_termios_baud_rate [2019-09-10 11:02:12,061 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_ldisc [2019-09-10 11:02:12,061 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unthrottle [2019-09-10 11:02:12,061 INFO L138 BoogieDeclarations]: Found implementation of procedure up [2019-09-10 11:02:12,062 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-09-10 11:02:12,062 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-09-10 11:02:12,062 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-09-10 11:02:12,062 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2019-09-10 11:02:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 11:02:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2019-09-10 11:02:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2019-09-10 11:02:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2019-09-10 11:02:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2019-09-10 11:02:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2019-09-10 11:02:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2019-09-10 11:02:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-10 11:02:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure __arch_swab32 [2019-09-10 11:02:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2019-09-10 11:02:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2019-09-10 11:02:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure __swab16p [2019-09-10 11:02:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure __swab32p [2019-09-10 11:02:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure __be32_to_cpup [2019-09-10 11:02:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure __be16_to_cpup [2019-09-10 11:02:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-09-10 11:02:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2019-09-10 11:02:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2019-09-10 11:02:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2019-09-10 11:02:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-10 11:02:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2019-09-10 11:02:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2019-09-10 11:02:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2019-09-10 11:02:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2019-09-10 11:02:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_bh [2019-09-10 11:02:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irq [2019-09-10 11:02:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2019-09-10 11:02:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_unlock_bh [2019-09-10 11:02:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_unlock_irq [2019-09-10 11:02:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_unlock_irqrestore [2019-09-10 11:02:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_read_lock [2019-09-10 11:02:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_lock_irq [2019-09-10 11:02:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_read_unlock [2019-09-10 11:02:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock_irq [2019-09-10 11:02:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2019-09-10 11:02:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2019-09-10 11:02:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2019-09-10 11:02:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2019-09-10 11:02:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2019-09-10 11:02:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2019-09-10 11:02:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-09-10 11:02:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-09-10 11:02:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2019-09-10 11:02:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2019-09-10 11:02:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2019-09-10 11:02:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2019-09-10 11:02:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2019-09-10 11:02:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_from_user_overflow [2019-09-10 11:02:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_to_user_overflow [2019-09-10 11:02:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2019-09-10 11:02:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2019-09-10 11:02:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_6 [2019-09-10 11:02:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_7 [2019-09-10 11:02:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_8 [2019-09-10 11:02:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_11 [2019-09-10 11:02:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_12 [2019-09-10 11:02:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_13 [2019-09-10 11:02:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_16 [2019-09-10 11:02:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_17 [2019-09-10 11:02:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_consume_skb_5 [2019-09-10 11:02:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_consume_skb_15 [2019-09-10 11:02:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_empty [2019-09-10 11:02:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-10 11:02:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_queue_head_init [2019-09-10 11:02:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-10 11:02:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_head_init [2019-09-10 11:02:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-10 11:02:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-10 11:02:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2019-09-10 11:02:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_dequeue_14 [2019-09-10 11:02:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure skb_is_nonlinear [2019-09-10 11:02:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2019-09-10 11:02:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2019-09-10 11:02:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2019-09-10 11:02:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headroom [2019-09-10 11:02:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tailroom [2019-09-10 11:02:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2019-09-10 11:02:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2019-09-10 11:02:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_purge [2019-09-10 11:02:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_18 [2019-09-10 11:02:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2019-09-10 11:02:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2019-09-10 11:02:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-10 11:02:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-09-10 11:02:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-10 11:02:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_size_t [2019-09-10 11:02:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-10 11:02:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-09-10 11:02:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-09-10 11:02:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-10 11:02:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-10 11:02:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-09-10 11:02:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-09-10 11:02:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-09-10 11:02:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-09-10 11:02:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-09-10 11:02:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-09-10 11:02:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-09-10 11:02:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_trap [2019-09-10 11:02:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_ppp_channel_ops_2 [2019-09-10 11:02:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_target_type_1 [2019-09-10 11:02:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure sema_init [2019-09-10 11:02:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure down [2019-09-10 11:02:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure up [2019-09-10 11:02:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure stop_tty [2019-09-10 11:02:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure start_tty [2019-09-10 11:02:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unthrottle [2019-09-10 11:02:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure tty_termios_baud_rate [2019-09-10 11:02:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure tty_get_baud_rate [2019-09-10 11:02:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure tty_mode_ioctl [2019-09-10 11:02:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure tty_register_ldisc [2019-09-10 11:02:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_ldisc [2019-09-10 11:02:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure n_tty_ioctl_helper [2019-09-10 11:02:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure __tasklet_schedule [2019-09-10 11:02:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2019-09-10 11:02:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_kill [2019-09-10 11:02:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_init [2019-09-10 11:02:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure crc_ccitt_byte [2019-09-10 11:02:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_output_wakeup [2019-09-10 11:02:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_input [2019-09-10 11:02:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_input_error [2019-09-10 11:02:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_register_channel [2019-09-10 11:02:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_unregister_channel [2019-09-10 11:02:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_channel_index [2019-09-10 11:02:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_unit_number [2019-09-10 11:02:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_be16 [2019-09-10 11:02:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_be32 [2019-09-10 11:02:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_encode [2019-09-10 11:02:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_send [2019-09-10 11:02:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_push [2019-09-10 11:02:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_flush_output [2019-09-10 11:02:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_input [2019-09-10 11:02:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_ioctl [2019-09-10 11:02:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_process [2019-09-10 11:02:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure async_lcp_peek [2019-09-10 11:02:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure ap_get [2019-09-10 11:02:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure ap_put [2019-09-10 11:02:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_open [2019-09-10 11:02:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_close [2019-09-10 11:02:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_hangup [2019-09-10 11:02:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_read [2019-09-10 11:02:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_write [2019-09-10 11:02:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_ioctl [2019-09-10 11:02:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_poll [2019-09-10 11:02:12,082 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_receive [2019-09-10 11:02:12,082 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_wakeup [2019-09-10 11:02:12,082 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_init [2019-09-10 11:02:12,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2019-09-10 11:02:12,082 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2019-09-10 11:02:12,082 INFO L130 BoogieDeclarations]: Found specification of procedure scan_ordinary [2019-09-10 11:02:12,082 INFO L130 BoogieDeclarations]: Found specification of procedure process_input_packet [2019-09-10 11:02:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_cleanup [2019-09-10 11:02:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-09-10 11:02:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-09-10 11:02:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 11:02:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_init [2019-09-10 11:02:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_add [2019-09-10 11:02:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2019-09-10 11:02:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_contains [2019-09-10 11:02:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_is_empty [2019-09-10 11:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2019-09-10 11:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2019-09-10 11:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2019-09-10 11:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2019-09-10 11:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2019-09-10 11:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_netdev_alloc_skb [2019-09-10 11:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb [2019-09-10 11:02:12,085 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_current [2019-09-10 11:02:12,085 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-09-10 11:02:12,085 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-09-10 11:02:12,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 11:02:12,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-09-10 11:02:12,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-10 11:02:12,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 11:02:12,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-09-10 11:02:12,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2019-09-10 11:02:12,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2019-09-10 11:02:12,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2019-09-10 11:02:13,321 INFO L684 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-09-10 11:02:16,843 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 11:02:16,843 INFO L283 CfgBuilder]: Removed 4 assume(true) statements. [2019-09-10 11:02:16,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 11:02:16 BoogieIcfgContainer [2019-09-10 11:02:16,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 11:02:16,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 11:02:16,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 11:02:16,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 11:02:16,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 11:02:09" (1/3) ... [2019-09-10 11:02:16,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29901374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 11:02:16, skipping insertion in model container [2019-09-10 11:02:16,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:02:11" (2/3) ... [2019-09-10 11:02:16,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29901374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 11:02:16, skipping insertion in model container [2019-09-10 11:02:16,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 11:02:16" (3/3) ... [2019-09-10 11:02:16,852 INFO L109 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 [2019-09-10 11:02:16,861 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 11:02:16,873 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 11:02:16,888 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 11:02:16,914 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 11:02:16,914 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 11:02:16,914 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 11:02:16,914 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 11:02:16,914 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 11:02:16,915 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 11:02:16,915 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 11:02:16,915 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 11:02:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states. [2019-09-10 11:02:16,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-10 11:02:16,974 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 11:02:16,975 INFO L399 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 11:02:16,976 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 11:02:16,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 11:02:16,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1398868385, now seen corresponding path program 1 times [2019-09-10 11:02:16,983 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 11:02:17,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 11:02:17,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 11:02:17,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 11:02:17,056 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 11:02:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 11:02:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-09-10 11:02:17,481 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 11:02:17,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 11:02:17,482 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 11:02:17,487 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 11:02:17,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 11:02:17,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 11:02:17,506 INFO L87 Difference]: Start difference. First operand 1101 states. Second operand 3 states. [2019-09-10 11:02:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 11:02:17,754 INFO L93 Difference]: Finished difference Result 2013 states and 2626 transitions. [2019-09-10 11:02:17,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 11:02:17,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2019-09-10 11:02:17,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 11:02:17,803 INFO L225 Difference]: With dead ends: 2013 [2019-09-10 11:02:17,803 INFO L226 Difference]: Without dead ends: 1996 [2019-09-10 11:02:17,805 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 11:02:17,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2019-09-10 11:02:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1996. [2019-09-10 11:02:17,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1996 states. [2019-09-10 11:02:18,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 2601 transitions. [2019-09-10 11:02:18,008 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 2601 transitions. Word has length 101 [2019-09-10 11:02:18,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 11:02:18,011 INFO L475 AbstractCegarLoop]: Abstraction has 1996 states and 2601 transitions. [2019-09-10 11:02:18,011 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 11:02:18,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 2601 transitions. [2019-09-10 11:02:18,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-10 11:02:18,026 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 11:02:18,027 INFO L399 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 11:02:18,027 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 11:02:18,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 11:02:18,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1385601703, now seen corresponding path program 1 times [2019-09-10 11:02:18,028 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 11:02:18,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 11:02:18,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 11:02:18,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 11:02:18,033 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 11:02:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 11:02:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-09-10 11:02:18,352 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 11:02:18,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-10 11:02:18,352 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 11:02:18,354 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 11:02:18,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 11:02:18,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-10 11:02:18,355 INFO L87 Difference]: Start difference. First operand 1996 states and 2601 transitions. Second operand 6 states. [2019-09-10 11:02:19,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 11:02:19,416 INFO L93 Difference]: Finished difference Result 3963 states and 5213 transitions. [2019-09-10 11:02:19,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-10 11:02:19,416 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2019-09-10 11:02:19,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 11:02:19,442 INFO L225 Difference]: With dead ends: 3963 [2019-09-10 11:02:19,442 INFO L226 Difference]: Without dead ends: 3944 [2019-09-10 11:02:19,443 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-10 11:02:19,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3944 states. [2019-09-10 11:02:19,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3944 to 3944. [2019-09-10 11:02:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3944 states. [2019-09-10 11:02:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3944 states to 3944 states and 5191 transitions. [2019-09-10 11:02:19,579 INFO L78 Accepts]: Start accepts. Automaton has 3944 states and 5191 transitions. Word has length 105 [2019-09-10 11:02:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 11:02:19,580 INFO L475 AbstractCegarLoop]: Abstraction has 3944 states and 5191 transitions. [2019-09-10 11:02:19,580 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 11:02:19,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3944 states and 5191 transitions. [2019-09-10 11:02:19,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-09-10 11:02:19,594 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 11:02:19,594 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 11:02:19,595 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 11:02:19,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 11:02:19,595 INFO L82 PathProgramCache]: Analyzing trace with hash 942734417, now seen corresponding path program 1 times [2019-09-10 11:02:19,595 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 11:02:19,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 11:02:19,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 11:02:19,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 11:02:19,599 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 11:02:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 11:02:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-09-10 11:02:19,857 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 11:02:19,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 11:02:19,857 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 11:02:19,858 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 11:02:19,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 11:02:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 11:02:19,858 INFO L87 Difference]: Start difference. First operand 3944 states and 5191 transitions. Second operand 3 states. [2019-09-10 11:02:19,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 11:02:19,979 INFO L93 Difference]: Finished difference Result 5660 states and 7505 transitions. [2019-09-10 11:02:19,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 11:02:19,979 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 188 [2019-09-10 11:02:19,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 11:02:20,015 INFO L225 Difference]: With dead ends: 5660 [2019-09-10 11:02:20,016 INFO L226 Difference]: Without dead ends: 5660 [2019-09-10 11:02:20,016 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 11:02:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5660 states. [2019-09-10 11:02:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5660 to 5636. [2019-09-10 11:02:20,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5636 states. [2019-09-10 11:02:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5636 states to 5636 states and 7481 transitions. [2019-09-10 11:02:20,218 INFO L78 Accepts]: Start accepts. Automaton has 5636 states and 7481 transitions. Word has length 188 [2019-09-10 11:02:20,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 11:02:20,218 INFO L475 AbstractCegarLoop]: Abstraction has 5636 states and 7481 transitions. [2019-09-10 11:02:20,218 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 11:02:20,218 INFO L276 IsEmpty]: Start isEmpty. Operand 5636 states and 7481 transitions. [2019-09-10 11:02:20,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-09-10 11:02:20,236 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 11:02:20,237 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 11:02:20,237 INFO L418 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 11:02:20,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 11:02:20,238 INFO L82 PathProgramCache]: Analyzing trace with hash -24961699, now seen corresponding path program 1 times [2019-09-10 11:02:20,238 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 11:02:20,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 11:02:20,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 11:02:20,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 11:02:20,242 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 11:02:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 11:02:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-09-10 11:02:20,409 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 11:02:20,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 11:02:20,410 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 11:02:20,411 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 11:02:20,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 11:02:20,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 11:02:20,412 INFO L87 Difference]: Start difference. First operand 5636 states and 7481 transitions. Second operand 3 states. [2019-09-10 11:02:20,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 11:02:20,533 INFO L93 Difference]: Finished difference Result 8544 states and 11144 transitions. [2019-09-10 11:02:20,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 11:02:20,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 213 [2019-09-10 11:02:20,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 11:02:20,598 INFO L225 Difference]: With dead ends: 8544 [2019-09-10 11:02:20,599 INFO L226 Difference]: Without dead ends: 8544 [2019-09-10 11:02:20,599 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 11:02:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8544 states. [2019-09-10 11:02:20,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8544 to 8522. [2019-09-10 11:02:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8522 states. [2019-09-10 11:02:20,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8522 states to 8522 states and 11122 transitions. [2019-09-10 11:02:20,899 INFO L78 Accepts]: Start accepts. Automaton has 8522 states and 11122 transitions. Word has length 213 [2019-09-10 11:02:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 11:02:20,900 INFO L475 AbstractCegarLoop]: Abstraction has 8522 states and 11122 transitions. [2019-09-10 11:02:20,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 11:02:20,900 INFO L276 IsEmpty]: Start isEmpty. Operand 8522 states and 11122 transitions. [2019-09-10 11:02:20,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-09-10 11:02:20,924 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 11:02:20,924 INFO L399 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 11:02:20,925 INFO L418 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 11:02:20,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 11:02:20,925 INFO L82 PathProgramCache]: Analyzing trace with hash 504861990, now seen corresponding path program 1 times [2019-09-10 11:02:20,925 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 11:02:20,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 11:02:20,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 11:02:20,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 11:02:20,928 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 11:02:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 11:02:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-09-10 11:02:21,190 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 11:02:21,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-10 11:02:21,191 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 11:02:21,191 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 11:02:21,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 11:02:21,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-10 11:02:21,192 INFO L87 Difference]: Start difference. First operand 8522 states and 11122 transitions. Second operand 6 states. [2019-09-10 11:02:21,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 11:02:21,285 INFO L93 Difference]: Finished difference Result 4446 states and 5772 transitions. [2019-09-10 11:02:21,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 11:02:21,285 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 226 [2019-09-10 11:02:21,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 11:02:21,310 INFO L225 Difference]: With dead ends: 4446 [2019-09-10 11:02:21,311 INFO L226 Difference]: Without dead ends: 4422 [2019-09-10 11:02:21,311 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-10 11:02:21,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4422 states. [2019-09-10 11:02:21,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4422 to 4344. [2019-09-10 11:02:21,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4344 states. [2019-09-10 11:02:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4344 states to 4344 states and 5663 transitions. [2019-09-10 11:02:21,458 INFO L78 Accepts]: Start accepts. Automaton has 4344 states and 5663 transitions. Word has length 226 [2019-09-10 11:02:21,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 11:02:21,458 INFO L475 AbstractCegarLoop]: Abstraction has 4344 states and 5663 transitions. [2019-09-10 11:02:21,458 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 11:02:21,459 INFO L276 IsEmpty]: Start isEmpty. Operand 4344 states and 5663 transitions. [2019-09-10 11:02:21,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-09-10 11:02:21,473 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 11:02:21,473 INFO L399 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 11:02:21,473 INFO L418 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 11:02:21,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 11:02:21,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1631021212, now seen corresponding path program 1 times [2019-09-10 11:02:21,474 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 11:02:21,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 11:02:21,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 11:02:21,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 11:02:21,477 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 11:02:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 11:02:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2019-09-10 11:02:21,616 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 11:02:21,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 11:02:21,617 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 11:02:21,617 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 11:02:21,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 11:02:21,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 11:02:21,618 INFO L87 Difference]: Start difference. First operand 4344 states and 5663 transitions. Second operand 3 states. [2019-09-10 11:02:21,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 11:02:21,756 INFO L93 Difference]: Finished difference Result 6134 states and 7969 transitions. [2019-09-10 11:02:21,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 11:02:21,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 226 [2019-09-10 11:02:21,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 11:02:21,786 INFO L225 Difference]: With dead ends: 6134 [2019-09-10 11:02:21,787 INFO L226 Difference]: Without dead ends: 6134 [2019-09-10 11:02:21,787 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 11:02:21,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6134 states. [2019-09-10 11:02:21,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6134 to 6107. [2019-09-10 11:02:21,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6107 states. [2019-09-10 11:02:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6107 states to 6107 states and 7942 transitions. [2019-09-10 11:02:21,936 INFO L78 Accepts]: Start accepts. Automaton has 6107 states and 7942 transitions. Word has length 226 [2019-09-10 11:02:21,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 11:02:21,937 INFO L475 AbstractCegarLoop]: Abstraction has 6107 states and 7942 transitions. [2019-09-10 11:02:21,937 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 11:02:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 6107 states and 7942 transitions. [2019-09-10 11:02:21,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-09-10 11:02:21,952 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 11:02:21,953 INFO L399 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 11:02:21,953 INFO L418 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 11:02:21,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 11:02:21,954 INFO L82 PathProgramCache]: Analyzing trace with hash -333928791, now seen corresponding path program 1 times [2019-09-10 11:02:21,954 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 11:02:21,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 11:02:21,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 11:02:21,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 11:02:21,957 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 11:02:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 11:02:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2019-09-10 11:02:22,161 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 11:02:22,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 11:02:22,162 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 11:02:22,162 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 11:02:22,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 11:02:22,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 11:02:22,164 INFO L87 Difference]: Start difference. First operand 6107 states and 7942 transitions. Second operand 3 states. [2019-09-10 11:02:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 11:02:22,219 INFO L93 Difference]: Finished difference Result 6127 states and 7962 transitions. [2019-09-10 11:02:22,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 11:02:22,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 231 [2019-09-10 11:02:22,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 11:02:22,254 INFO L225 Difference]: With dead ends: 6127 [2019-09-10 11:02:22,254 INFO L226 Difference]: Without dead ends: 6127 [2019-09-10 11:02:22,255 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 11:02:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6127 states. [2019-09-10 11:02:22,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6127 to 6117. [2019-09-10 11:02:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6117 states. [2019-09-10 11:02:22,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6117 states to 6117 states and 7952 transitions. [2019-09-10 11:02:22,453 INFO L78 Accepts]: Start accepts. Automaton has 6117 states and 7952 transitions. Word has length 231 [2019-09-10 11:02:22,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 11:02:22,454 INFO L475 AbstractCegarLoop]: Abstraction has 6117 states and 7952 transitions. [2019-09-10 11:02:22,455 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 11:02:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 6117 states and 7952 transitions. [2019-09-10 11:02:22,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-09-10 11:02:22,473 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 11:02:22,473 INFO L399 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 11:02:22,473 INFO L418 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 11:02:22,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 11:02:22,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1760919976, now seen corresponding path program 1 times [2019-09-10 11:02:22,474 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 11:02:22,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 11:02:22,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 11:02:22,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 11:02:22,484 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 11:02:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 11:02:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2019-09-10 11:02:22,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 11:02:22,856 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 11:02:22,857 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 234 with the following transitions: [2019-09-10 11:02:22,860 INFO L207 CegarAbsIntRunner]: [86], [87], [88], [89], [355], [357], [362], [364], [365], [367], [426], [428], [437], [439], [440], [441], [442], [443], [445], [446], [460], [462], [463], [464], [760], [761], [794], [820], [822], [827], [829], [835], [839], [841], [843], [845], [847], [848], [849], [850], [851], [900], [902], [904], [906], [908], [910], [912], [914], [916], [918], [920], [922], [924], [927], [930], [943], [956], [977], [980], [983], [985], [995], [1091], [1094], [1097], [1100], [1103], [1105], [1109], [1112], [1115], [1117], [1120], [1122], [1131], [1373], [1374], [1375], [1376], [1377], [1378], [1379], [1388], [1391], [1393], [1395], [1398], [1406], [1415], [1420], [1426], [1428], [1430], [1431], [1432], [1458], [1459], [1460], [1462], [1463], [1487], [1489], [1947], [1949], [1952], [1956], [1959], [1961], [1966], [1974], [1977], [1981], [2263], [2264], [2265], [2266], [2281], [2282], [2283], [2284], [2285], [2286], [2291], [2292], [2349], [2350], [2351], [2352], [2353], [2354], [2357], [2358], [2359], [2360], [2361], [2362], [2363], [2364], [2365], [2366], [2367], [2368], [2385], [2386], [2387], [2388], [2389], [2390], [2391], [2392], [2393], [2394], [2395], [2396], [2397], [2398], [2399], [2400], [2401], [2402], [2403], [2404], [2405], [2406], [2415], [2416], [2433], [2434], [2435], [2436], [2437], [2438], [2439], [2440], [2451], [2507], [2508], [2519], [2520], [2581], [2582], [2583], [2584], [2585], [2599], [2600], [2601] [2019-09-10 11:02:22,927 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 11:02:22,928 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 11:02:23,004 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-10 11:02:23,006 INFO L272 AbstractInterpreter]: Visited 2 different actions 2 times. Never merged. Never widened. Performed 56 root evaluator evaluations with a maximum evaluation depth of 0. Performed 56 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 128 variables. [2019-09-10 11:02:23,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 11:02:23,010 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-10 11:02:23,124 INFO L219 lantSequenceWeakener]: Could never weaken! [2019-09-10 11:02:23,125 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-10 11:02:23,134 INFO L420 sIntCurrentIteration]: We unified 232 AI predicates to 232 [2019-09-10 11:02:23,134 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-10 11:02:23,135 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-10 11:02:23,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 9 [2019-09-10 11:02:23,136 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 11:02:23,137 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 11:02:23,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 11:02:23,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 11:02:23,139 INFO L87 Difference]: Start difference. First operand 6117 states and 7952 transitions. Second operand 2 states. [2019-09-10 11:02:23,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 11:02:23,139 INFO L93 Difference]: Finished difference Result 2 states and 1 transitions. [2019-09-10 11:02:23,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 11:02:23,140 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 233 [2019-09-10 11:02:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 11:02:23,140 INFO L225 Difference]: With dead ends: 2 [2019-09-10 11:02:23,140 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 11:02:23,140 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 11:02:23,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 11:02:23,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 11:02:23,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 11:02:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 11:02:23,141 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 233 [2019-09-10 11:02:23,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 11:02:23,142 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 11:02:23,142 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 11:02:23,142 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 11:02:23,142 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 11:02:23,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 11:02:23 BoogieIcfgContainer [2019-09-10 11:02:23,148 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 11:02:23,151 INFO L168 Benchmark]: Toolchain (without parser) took 13931.56 ms. Allocated memory was 133.2 MB in the beginning and 571.5 MB in the end (delta: 438.3 MB). Free memory was 79.8 MB in the beginning and 195.9 MB in the end (delta: -116.0 MB). Peak memory consumption was 322.3 MB. Max. memory is 7.1 GB. [2019-09-10 11:02:23,152 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 133.2 MB. Free memory was 107.6 MB in the beginning and 107.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-09-10 11:02:23,155 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2503.08 ms. Allocated memory was 133.2 MB in the beginning and 265.8 MB in the end (delta: 132.6 MB). Free memory was 79.6 MB in the beginning and 202.8 MB in the end (delta: -123.1 MB). Peak memory consumption was 113.7 MB. Max. memory is 7.1 GB. [2019-09-10 11:02:23,157 INFO L168 Benchmark]: Boogie Preprocessor took 246.53 ms. Allocated memory is still 265.8 MB. Free memory was 202.8 MB in the beginning and 186.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2019-09-10 11:02:23,158 INFO L168 Benchmark]: RCFGBuilder took 4875.73 ms. Allocated memory was 265.8 MB in the beginning and 365.4 MB in the end (delta: 99.6 MB). Free memory was 186.8 MB in the beginning and 180.0 MB in the end (delta: 6.8 MB). Peak memory consumption was 132.8 MB. Max. memory is 7.1 GB. [2019-09-10 11:02:23,164 INFO L168 Benchmark]: TraceAbstraction took 6302.03 ms. Allocated memory was 365.4 MB in the beginning and 571.5 MB in the end (delta: 206.0 MB). Free memory was 180.0 MB in the beginning and 195.9 MB in the end (delta: -15.9 MB). Peak memory consumption was 190.2 MB. Max. memory is 7.1 GB. [2019-09-10 11:02:23,172 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 133.2 MB. Free memory was 107.6 MB in the beginning and 107.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2503.08 ms. Allocated memory was 133.2 MB in the beginning and 265.8 MB in the end (delta: 132.6 MB). Free memory was 79.6 MB in the beginning and 202.8 MB in the end (delta: -123.1 MB). Peak memory consumption was 113.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 246.53 ms. Allocated memory is still 265.8 MB. Free memory was 202.8 MB in the beginning and 186.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4875.73 ms. Allocated memory was 265.8 MB in the beginning and 365.4 MB in the end (delta: 99.6 MB). Free memory was 186.8 MB in the beginning and 180.0 MB in the end (delta: 6.8 MB). Peak memory consumption was 132.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6302.03 ms. Allocated memory was 365.4 MB in the beginning and 571.5 MB in the end (delta: 206.0 MB). Free memory was 180.0 MB in the beginning and 195.9 MB in the end (delta: -15.9 MB). Peak memory consumption was 190.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5659]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 154 procedures, 1163 locations, 1 error locations. SAFE Result, 6.2s OverallTime, 8 OverallIterations, 12 TraceHistogramMax, 2.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 10980 SDtfs, 5145 SDslu, 17692 SDs, 0 SdLazy, 597 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 263 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8522occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 1.0 AbsIntWeakeningRatio, 1.9310344827586208 AbsIntAvgWeakeningVarsNumRemoved, 0.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 161 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 1523 NumberOfCodeBlocks, 1523 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 1515 ConstructedInterpolants, 0 QuantifiedInterpolants, 386174 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 7 PerfectInterpolantSequences, 1878/1885 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...