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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-linux-3.0/usb_urb-drivers-staging-lirc-lirc_imon.ko.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:20:26,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:20:26,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:20:26,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:20:26,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:20:26,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:20:26,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:20:26,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:20:26,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:20:26,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:20:26,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:20:26,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:20:26,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:20:26,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:20:26,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:20:26,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:20:26,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:20:26,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:20:26,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:20:26,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:20:26,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:20:26,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:20:26,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:20:26,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:20:26,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 18:20:26,311 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 18:20:26,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 18:20:26,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 18:20:26,314 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 18:20:26,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 18:20:26,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:20:26,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:20:26,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:20:26,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:20:26,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:20:26,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:20:26,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:20:26,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:20:26,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:20:26,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:20:26,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:20:26,329 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:20:26,351 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:20:26,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:20:26,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:20:26,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:20:26,356 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:20:26,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:20:26,356 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:20:26,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:20:26,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:20:26,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:20:26,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:20:26,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:20:26,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:20:26,359 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:20:26,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:20:26,359 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:20:26,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:20:26,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:20:26,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:20:26,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:20:26,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:20:26,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:20:26,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:20:26,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:20:26,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:20:26,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:20:26,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:20:26,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:20:26,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:20:26,710 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:20:26,727 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:20:26,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:20:26,733 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:20:26,733 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:20:26,734 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.0/usb_urb-drivers-staging-lirc-lirc_imon.ko.cil.out.i [2019-10-13 18:20:26,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2612da0d7/c7a9ca53ef604e6ea863ec7b50b50cc2/FLAG165dab0b4 [2019-10-13 18:20:27,652 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:20:27,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-3.0/usb_urb-drivers-staging-lirc-lirc_imon.ko.cil.out.i [2019-10-13 18:20:27,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2612da0d7/c7a9ca53ef604e6ea863ec7b50b50cc2/FLAG165dab0b4 [2019-10-13 18:20:28,206 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2612da0d7/c7a9ca53ef604e6ea863ec7b50b50cc2 [2019-10-13 18:20:28,216 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:20:28,217 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:20:28,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:20:28,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:20:28,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:20:28,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:20:28" (1/1) ... [2019-10-13 18:20:28,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@470e4ddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:20:28, skipping insertion in model container [2019-10-13 18:20:28,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:20:28" (1/1) ... [2019-10-13 18:20:28,234 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:20:28,353 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:20:29,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:20:29,672 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:20:29,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:20:30,191 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:20:30,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:20:30 WrapperNode [2019-10-13 18:20:30,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:20:30,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:20:30,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:20:30,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:20:30,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:20:30" (1/1) ... [2019-10-13 18:20:30,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:20:30" (1/1) ... [2019-10-13 18:20:30,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:20:30" (1/1) ... [2019-10-13 18:20:30,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:20:30" (1/1) ... [2019-10-13 18:20:30,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:20:30" (1/1) ... [2019-10-13 18:20:30,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:20:30" (1/1) ... [2019-10-13 18:20:30,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:20:30" (1/1) ... [2019-10-13 18:20:30,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:20:30,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:20:30,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:20:30,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:20:30,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:20:30" (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 [2019-10-13 18:20:30,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:20:30,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:20:30,631 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2019-10-13 18:20:30,632 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2019-10-13 18:20:30,632 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2019-10-13 18:20:30,633 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2019-10-13 18:20:30,634 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2019-10-13 18:20:30,634 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2019-10-13 18:20:30,634 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2019-10-13 18:20:30,634 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2019-10-13 18:20:30,635 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2019-10-13 18:20:30,635 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2019-10-13 18:20:30,636 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2019-10-13 18:20:30,636 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2019-10-13 18:20:30,638 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2019-10-13 18:20:30,638 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register [2019-10-13 18:20:30,641 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2019-10-13 18:20:30,642 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2019-10-13 18:20:30,642 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_int_must_check_helper [2019-10-13 18:20:30,643 INFO L138 BoogieDeclarations]: Found implementation of procedure lirc_buffer_init [2019-10-13 18:20:30,643 INFO L138 BoogieDeclarations]: Found implementation of procedure lirc_buffer_free [2019-10-13 18:20:30,644 INFO L138 BoogieDeclarations]: Found implementation of procedure lirc_buffer_write [2019-10-13 18:20:30,644 INFO L138 BoogieDeclarations]: Found implementation of procedure free_imon_context [2019-10-13 18:20:30,644 INFO L138 BoogieDeclarations]: Found implementation of procedure deregister_from_lirc [2019-10-13 18:20:30,645 INFO L138 BoogieDeclarations]: Found implementation of procedure display_open [2019-10-13 18:20:30,645 INFO L138 BoogieDeclarations]: Found implementation of procedure display_close [2019-10-13 18:20:30,645 INFO L138 BoogieDeclarations]: Found implementation of procedure send_packet [2019-10-13 18:20:30,645 INFO L138 BoogieDeclarations]: Found implementation of procedure vfd_write [2019-10-13 18:20:30,645 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_tx_callback [2019-10-13 18:20:30,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ir_open [2019-10-13 18:20:30,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ir_close [2019-10-13 18:20:30,646 INFO L138 BoogieDeclarations]: Found implementation of procedure submit_data [2019-10-13 18:20:30,646 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_incoming_packet [2019-10-13 18:20:30,647 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_rx_callback [2019-10-13 18:20:30,647 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_probe [2019-10-13 18:20:30,647 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_disconnect [2019-10-13 18:20:30,647 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_suspend [2019-10-13 18:20:30,648 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_resume [2019-10-13 18:20:30,648 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_init [2019-10-13 18:20:30,648 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_exit [2019-10-13 18:20:30,648 INFO L138 BoogieDeclarations]: Found implementation of procedure init_module [2019-10-13 18:20:30,649 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup_module [2019-10-13 18:20:30,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:20:30,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_blast_assert [2019-10-13 18:20:30,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume_stop [2019-10-13 18:20:30,649 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2019-10-13 18:20:30,650 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2019-10-13 18:20:30,650 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2019-10-13 18:20:30,650 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2019-10-13 18:20:30,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-10-13 18:20:30,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2019-10-13 18:20:30,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_alloc [2019-10-13 18:20:30,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_free [2019-10-13 18:20:30,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_in [2019-10-13 18:20:30,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_in_r [2019-10-13 18:20:30,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2019-10-13 18:20:30,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2019-10-13 18:20:30,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2019-10-13 18:20:30,653 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2019-10-13 18:20:30,653 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2019-10-13 18:20:30,654 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2019-10-13 18:20:30,654 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_unlock_irqrestore [2019-10-13 18:20:30,654 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2019-10-13 18:20:30,655 INFO L138 BoogieDeclarations]: Found implementation of procedure complete_all [2019-10-13 18:20:30,655 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2019-10-13 18:20:30,655 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_printk [2019-10-13 18:20:30,656 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2019-10-13 18:20:30,656 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_warn [2019-10-13 18:20:30,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2019-10-13 18:20:30,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-10-13 18:20:30,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undefined_pointer [2019-10-13 18:20:30,657 INFO L138 BoogieDeclarations]: Found implementation of procedure lirc_register_driver [2019-10-13 18:20:30,658 INFO L138 BoogieDeclarations]: Found implementation of procedure lirc_unregister_driver [2019-10-13 18:20:30,658 INFO L138 BoogieDeclarations]: Found implementation of procedure memdup_user [2019-10-13 18:20:30,659 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2019-10-13 18:20:30,659 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2019-10-13 18:20:30,659 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-10-13 18:20:30,659 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2019-10-13 18:20:30,659 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister_dev [2019-10-13 18:20:30,660 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_find_interface [2019-10-13 18:20:30,660 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_dev [2019-10-13 18:20:30,660 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2019-10-13 18:20:30,661 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_match_id [2019-10-13 18:20:30,661 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_dev [2019-10-13 18:20:30,661 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2019-10-13 18:20:30,661 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2019-10-13 18:20:30,661 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion_interruptible [2019-10-13 18:20:30,662 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_fmt [2019-10-13 18:20:30,662 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-10-13 18:20:30,663 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-10-13 18:20:30,663 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2019-10-13 18:20:30,664 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2019-10-13 18:20:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:20:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-10-13 18:20:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_fmt [2019-10-13 18:20:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure memdup_user [2019-10-13 18:20:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2019-10-13 18:20:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2019-10-13 18:20:30,665 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2019-10-13 18:20:30,665 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2019-10-13 18:20:30,665 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2019-10-13 18:20:30,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 18:20:30,665 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2019-10-13 18:20:30,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 18:20:30,666 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2019-10-13 18:20:30,666 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2019-10-13 18:20:30,666 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_unlock_irqrestore [2019-10-13 18:20:30,666 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2019-10-13 18:20:30,666 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2019-10-13 18:20:30,666 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2019-10-13 18:20:30,667 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2019-10-13 18:20:30,667 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2019-10-13 18:20:30,667 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2019-10-13 18:20:30,667 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2019-10-13 18:20:30,668 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2019-10-13 18:20:30,668 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion_interruptible [2019-10-13 18:20:30,668 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2019-10-13 18:20:30,668 INFO L130 BoogieDeclarations]: Found specification of procedure complete_all [2019-10-13 18:20:30,668 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-10-13 18:20:30,669 INFO L130 BoogieDeclarations]: Found specification of procedure init_module [2019-10-13 18:20:30,669 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup_module [2019-10-13 18:20:30,669 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2019-10-13 18:20:30,669 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2019-10-13 18:20:30,670 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2019-10-13 18:20:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2019-10-13 18:20:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2019-10-13 18:20:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure dev_printk [2019-10-13 18:20:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure dev_warn [2019-10-13 18:20:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2019-10-13 18:20:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2019-10-13 18:20:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure noop_llseek [2019-10-13 18:20:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2019-10-13 18:20:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2019-10-13 18:20:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2019-10-13 18:20:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 18:20:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_dev [2019-10-13 18:20:30,674 INFO L130 BoogieDeclarations]: Found specification of procedure usb_match_id [2019-10-13 18:20:30,674 INFO L130 BoogieDeclarations]: Found specification of procedure usb_find_interface [2019-10-13 18:20:30,674 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2019-10-13 18:20:30,675 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register [2019-10-13 18:20:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 18:20:30,679 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2019-10-13 18:20:30,680 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_dev [2019-10-13 18:20:30,681 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister_dev [2019-10-13 18:20:30,689 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2019-10-13 18:20:30,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 18:20:30,690 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2019-10-13 18:20:30,690 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2019-10-13 18:20:30,690 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2019-10-13 18:20:30,691 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2019-10-13 18:20:30,691 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2019-10-13 18:20:30,691 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2019-10-13 18:20:30,692 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2019-10-13 18:20:30,693 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_int_must_check_helper [2019-10-13 18:20:30,693 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_alloc [2019-10-13 18:20:30,693 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_free [2019-10-13 18:20:30,693 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_in [2019-10-13 18:20:30,694 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_in_r [2019-10-13 18:20:30,694 INFO L130 BoogieDeclarations]: Found specification of procedure lirc_buffer_init [2019-10-13 18:20:30,694 INFO L130 BoogieDeclarations]: Found specification of procedure lirc_buffer_free [2019-10-13 18:20:30,694 INFO L130 BoogieDeclarations]: Found specification of procedure lirc_buffer_write [2019-10-13 18:20:30,694 INFO L130 BoogieDeclarations]: Found specification of procedure lirc_register_driver [2019-10-13 18:20:30,694 INFO L130 BoogieDeclarations]: Found specification of procedure lirc_unregister_driver [2019-10-13 18:20:30,695 INFO L130 BoogieDeclarations]: Found specification of procedure imon_probe [2019-10-13 18:20:30,695 INFO L130 BoogieDeclarations]: Found specification of procedure imon_disconnect [2019-10-13 18:20:30,695 INFO L130 BoogieDeclarations]: Found specification of procedure usb_rx_callback [2019-10-13 18:20:30,695 INFO L130 BoogieDeclarations]: Found specification of procedure usb_tx_callback [2019-10-13 18:20:30,696 INFO L130 BoogieDeclarations]: Found specification of procedure imon_resume [2019-10-13 18:20:30,696 INFO L130 BoogieDeclarations]: Found specification of procedure imon_suspend [2019-10-13 18:20:30,696 INFO L130 BoogieDeclarations]: Found specification of procedure display_open [2019-10-13 18:20:30,696 INFO L130 BoogieDeclarations]: Found specification of procedure display_close [2019-10-13 18:20:30,696 INFO L130 BoogieDeclarations]: Found specification of procedure vfd_write [2019-10-13 18:20:30,697 INFO L130 BoogieDeclarations]: Found specification of procedure ir_open [2019-10-13 18:20:30,697 INFO L130 BoogieDeclarations]: Found specification of procedure ir_close [2019-10-13 18:20:30,697 INFO L130 BoogieDeclarations]: Found specification of procedure imon_init [2019-10-13 18:20:30,697 INFO L130 BoogieDeclarations]: Found specification of procedure imon_exit [2019-10-13 18:20:30,698 INFO L130 BoogieDeclarations]: Found specification of procedure free_imon_context [2019-10-13 18:20:30,698 INFO L130 BoogieDeclarations]: Found specification of procedure deregister_from_lirc [2019-10-13 18:20:30,698 INFO L130 BoogieDeclarations]: Found specification of procedure send_packet [2019-10-13 18:20:30,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2019-10-13 18:20:30,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 18:20:30,699 INFO L130 BoogieDeclarations]: Found specification of procedure submit_data [2019-10-13 18:20:30,699 INFO L130 BoogieDeclarations]: Found specification of procedure imon_incoming_packet [2019-10-13 18:20:30,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2019-10-13 18:20:30,699 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-10-13 18:20:30,700 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2019-10-13 18:20:30,700 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-10-13 18:20:30,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:20:30,700 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:20:30,700 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_blast_assert [2019-10-13 18:20:30,701 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undefined_pointer [2019-10-13 18:20:30,701 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume_stop [2019-10-13 18:20:30,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-13 18:20:30,702 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-10-13 18:20:30,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-13 18:20:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-13 18:20:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 18:20:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:20:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 18:20:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-13 18:20:30,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:20:30,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-10-13 18:20:30,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2019-10-13 18:20:30,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2019-10-13 18:20:30,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2019-10-13 18:20:32,825 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_assume_stopFINAL: assume true; [2019-10-13 18:20:39,175 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-13 18:20:39,205 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2019-10-13 18:20:39,206 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2019-10-13 18:20:39,422 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-13 18:20:39,470 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume !false; [2019-10-13 18:20:39,470 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##22: assume false; [2019-10-13 18:20:39,853 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:20:39,854 INFO L284 CfgBuilder]: Removed 40 assume(true) statements. [2019-10-13 18:20:39,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:20:39 BoogieIcfgContainer [2019-10-13 18:20:39,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:20:39,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:20:39,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:20:39,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:20:39,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:20:28" (1/3) ... [2019-10-13 18:20:39,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37dbe210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:20:39, skipping insertion in model container [2019-10-13 18:20:39,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:20:30" (2/3) ... [2019-10-13 18:20:39,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37dbe210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:20:39, skipping insertion in model container [2019-10-13 18:20:39,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:20:39" (3/3) ... [2019-10-13 18:20:39,866 INFO L109 eAbstractionObserver]: Analyzing ICFG usb_urb-drivers-staging-lirc-lirc_imon.ko.cil.out.i [2019-10-13 18:20:39,876 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:20:39,890 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:20:39,902 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:20:39,935 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:20:39,935 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:20:39,935 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:20:39,935 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:20:39,936 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:20:39,936 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:20:39,936 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:20:39,936 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:20:39,971 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states. [2019-10-13 18:20:39,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 18:20:39,981 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:20:39,982 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:20:39,985 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:20:39,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:20:39,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1136421439, now seen corresponding path program 1 times [2019-10-13 18:20:40,002 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:20:40,002 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197615839] [2019-10-13 18:20:40,003 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:20:40,003 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:20:40,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:20:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:20:47,985 WARN L191 SmtUtils]: Spent 6.96 s on a formula simplification that was a NOOP. DAG size: 1057 [2019-10-13 18:20:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:20:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:20:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:20:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:20:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:20:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:20:48,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197615839] [2019-10-13 18:20:48,289 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:20:48,289 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:20:48,289 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993067709] [2019-10-13 18:20:48,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 18:20:48,296 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:20:48,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 18:20:48,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 18:20:48,313 INFO L87 Difference]: Start difference. First operand 690 states. Second operand 4 states. [2019-10-13 18:20:57,569 WARN L191 SmtUtils]: Spent 6.71 s on a formula simplification that was a NOOP. DAG size: 1059