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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 02:58:12,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 02:58:12,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 02:58:12,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 02:58:12,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 02:58:12,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 02:58:12,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 02:58:12,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 02:58:12,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 02:58:12,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 02:58:12,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 02:58:12,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 02:58:12,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 02:58:12,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 02:58:12,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 02:58:12,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 02:58:12,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 02:58:12,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 02:58:12,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 02:58:12,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 02:58:12,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 02:58:12,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 02:58:12,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 02:58:12,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 02:58:12,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 02:58:12,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 02:58:12,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 02:58:12,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 02:58:12,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 02:58:12,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 02:58:12,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 02:58:12,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 02:58:12,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 02:58:12,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 02:58:12,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 02:58:12,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 02:58:12,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 02:58:12,124 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 02:58:12,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 02:58:12,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 02:58:12,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 02:58:12,128 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 [2019-10-15 02:58:12,160 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 02:58:12,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 02:58:12,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 02:58:12,162 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 02:58:12,165 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 02:58:12,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 02:58:12,166 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 02:58:12,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 02:58:12,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 02:58:12,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 02:58:12,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 02:58:12,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 02:58:12,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 02:58:12,167 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 02:58:12,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 02:58:12,167 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 02:58:12,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 02:58:12,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 02:58:12,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 02:58:12,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 02:58:12,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 02:58:12,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 02:58:12,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 02:58:12,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 02:58:12,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 02:58:12,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 02:58:12,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 02:58:12,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 02:58:12,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 02:58:12,457 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 02:58:12,470 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 02:58:12,473 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 02:58:12,474 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 02:58:12,475 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 02:58:12,475 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2019-10-15 02:58:12,551 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16fa7dee1/055c41b558a048d28b066207c767b50e/FLAG0613da93d [2019-10-15 02:58:13,273 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 02:58:13,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2019-10-15 02:58:13,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16fa7dee1/055c41b558a048d28b066207c767b50e/FLAG0613da93d [2019-10-15 02:58:13,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16fa7dee1/055c41b558a048d28b066207c767b50e [2019-10-15 02:58:13,417 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 02:58:13,418 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 02:58:13,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 02:58:13,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 02:58:13,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 02:58:13,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:58:13" (1/1) ... [2019-10-15 02:58:13,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@698ae32f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:13, skipping insertion in model container [2019-10-15 02:58:13,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:58:13" (1/1) ... [2019-10-15 02:58:13,433 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 02:58:13,533 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 02:58:14,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:58:14,676 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 02:58:14,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:58:14,998 INFO L192 MainTranslator]: Completed translation [2019-10-15 02:58:14,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:14 WrapperNode [2019-10-15 02:58:14,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 02:58:15,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 02:58:15,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 02:58:15,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 02:58:15,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:14" (1/1) ... [2019-10-15 02:58:15,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:14" (1/1) ... [2019-10-15 02:58:15,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:14" (1/1) ... [2019-10-15 02:58:15,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:14" (1/1) ... [2019-10-15 02:58:15,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:14" (1/1) ... [2019-10-15 02:58:15,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:14" (1/1) ... [2019-10-15 02:58:15,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:14" (1/1) ... [2019-10-15 02:58:15,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 02:58:15,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 02:58:15,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 02:58:15,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 02:58:15,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:14" (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 [2019-10-15 02:58:15,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 02:58:15,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 02:58:15,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-10-15 02:58:15,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-10-15 02:58:15,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2019-10-15 02:58:15,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2019-10-15 02:58:15,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-10-15 02:58:15,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-10-15 02:58:15,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-10-15 02:58:15,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-10-15 02:58:15,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2019-10-15 02:58:15,353 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2019-10-15 02:58:15,353 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2019-10-15 02:58:15,353 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2019-10-15 02:58:15,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kzalloc_1 [2019-10-15 02:58:15,354 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2019-10-15 02:58:15,356 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2019-10-15 02:58:15,356 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2019-10-15 02:58:15,356 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_bulk_in [2019-10-15 02:58:15,357 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_bulk_out [2019-10-15 02:58:15,357 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register [2019-10-15 02:58:15,357 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_data [2019-10-15 02:58:15,358 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_data [2019-10-15 02:58:15,358 INFO L138 BoogieDeclarations]: Found implementation of procedure qcprobe [2019-10-15 02:58:15,358 INFO L138 BoogieDeclarations]: Found implementation of procedure qc_release [2019-10-15 02:58:15,358 INFO L138 BoogieDeclarations]: Found implementation of procedure qcinit [2019-10-15 02:58:15,358 INFO L138 BoogieDeclarations]: Found implementation of procedure qcexit [2019-10-15 02:58:15,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_usb_serial_driver_1 [2019-10-15 02:58:15,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_driver_2 [2019-10-15 02:58:15,360 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 02:58:15,360 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2019-10-15 02:58:15,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_register_driver_2 [2019-10-15 02:58:15,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_interface_3 [2019-10-15 02:58:15,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_4 [2019-10-15 02:58:15,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_interface_5 [2019-10-15 02:58:15,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_interface_6 [2019-10-15 02:58:15,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_7 [2019-10-15 02:58:15,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_interface_8 [2019-10-15 02:58:15,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_9 [2019-10-15 02:58:15,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_10 [2019-10-15 02:58:15,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_deregister_11 [2019-10-15 02:58:15,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-10-15 02:58:15,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc [2019-10-15 02:58:15,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2019-10-15 02:58:15,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-10-15 02:58:15,363 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2019-10-15 02:58:15,364 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2019-10-15 02:58:15,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-10-15 02:58:15,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_reset_resume_2 [2019-10-15 02:58:15,365 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-10-15 02:58:15,365 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2019-10-15 02:58:15,365 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_enable_autosuspend [2019-10-15 02:58:15,365 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2019-10-15 02:58:15,366 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2019-10-15 02:58:15,366 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2019-10-15 02:58:15,366 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2019-10-15 02:58:15,366 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_register [2019-10-15 02:58:15,367 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2019-10-15 02:58:15,368 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2019-10-15 02:58:15,368 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2019-10-15 02:58:15,369 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_chars_in_buffer [2019-10-15 02:58:15,369 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_close [2019-10-15 02:58:15,369 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_disconnect [2019-10-15 02:58:15,370 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_open [2019-10-15 02:58:15,370 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_release [2019-10-15 02:58:15,370 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_resume [2019-10-15 02:58:15,370 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_startup [2019-10-15 02:58:15,371 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_suspend [2019-10-15 02:58:15,371 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write [2019-10-15 02:58:15,371 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write_room [2019-10-15 02:58:15,372 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-10-15 02:58:15,372 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-10-15 02:58:15,372 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-10-15 02:58:15,373 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-10-15 02:58:15,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 02:58:15,422 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-10-15 02:58:15,422 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 02:58:15,422 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 02:58:15,423 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-15 02:58:15,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 02:58:15,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-15 02:58:15,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-15 02:58:15,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 02:58:15,425 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-10-15 02:58:15,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 02:58:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-10-15 02:58:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-10-15 02:58:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2019-10-15 02:58:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2019-10-15 02:58:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-10-15 02:58:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-10-15 02:58:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-10-15 02:58:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-10-15 02:58:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-10-15 02:58:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2019-10-15 02:58:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc [2019-10-15 02:58:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2019-10-15 02:58:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2019-10-15 02:58:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2019-10-15 02:58:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-10-15 02:58:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_4 [2019-10-15 02:58:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_7 [2019-10-15 02:58:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_9 [2019-10-15 02:58:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_10 [2019-10-15 02:58:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2019-10-15 02:58:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2019-10-15 02:58:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kzalloc_1 [2019-10-15 02:58:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2019-10-15 02:58:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_usb_serial_driver_1 [2019-10-15 02:58:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_driver_2 [2019-10-15 02:58:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2019-10-15 02:58:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2019-10-15 02:58:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 02:58:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2019-10-15 02:58:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2019-10-15 02:58:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_bulk_in [2019-10-15 02:58:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_bulk_out [2019-10-15 02:58:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure usb_enable_autosuspend [2019-10-15 02:58:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2019-10-15 02:58:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_register_driver_2 [2019-10-15 02:58:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register [2019-10-15 02:58:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 02:58:15,435 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2019-10-15 02:58:15,435 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_deregister_11 [2019-10-15 02:58:15,436 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2019-10-15 02:58:15,436 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_interface_3 [2019-10-15 02:58:15,436 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_interface_5 [2019-10-15 02:58:15,437 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_interface_6 [2019-10-15 02:58:15,437 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_interface_8 [2019-10-15 02:58:15,437 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_data [2019-10-15 02:58:15,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 02:58:15,438 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_data [2019-10-15 02:58:15,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 02:58:15,439 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_register [2019-10-15 02:58:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2019-10-15 02:58:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2019-10-15 02:58:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2019-10-15 02:58:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2019-10-15 02:58:15,443 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2019-10-15 02:58:15,443 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_open [2019-10-15 02:58:15,443 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_close [2019-10-15 02:58:15,444 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_startup [2019-10-15 02:58:15,444 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_disconnect [2019-10-15 02:58:15,444 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_release [2019-10-15 02:58:15,452 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write_room [2019-10-15 02:58:15,453 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write [2019-10-15 02:58:15,453 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_chars_in_buffer [2019-10-15 02:58:15,453 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_suspend [2019-10-15 02:58:15,453 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_resume [2019-10-15 02:58:15,454 INFO L130 BoogieDeclarations]: Found specification of procedure qcprobe [2019-10-15 02:58:15,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 02:58:15,455 INFO L130 BoogieDeclarations]: Found specification of procedure qc_release [2019-10-15 02:58:15,456 INFO L130 BoogieDeclarations]: Found specification of procedure qcinit [2019-10-15 02:58:15,456 INFO L130 BoogieDeclarations]: Found specification of procedure qcexit [2019-10-15 02:58:15,456 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_reset_resume_2 [2019-10-15 02:58:15,456 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-10-15 02:58:15,457 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-10-15 02:58:15,457 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 02:58:15,457 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-10-15 02:58:15,457 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-10-15 02:58:15,457 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 02:58:15,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 02:58:15,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 02:58:15,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-15 02:58:15,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 02:58:15,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 02:58:16,741 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-10-15 02:58:18,760 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 02:58:18,760 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-15 02:58:18,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:58:18 BoogieIcfgContainer [2019-10-15 02:58:18,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 02:58:18,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 02:58:18,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 02:58:18,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 02:58:18,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:58:13" (1/3) ... [2019-10-15 02:58:18,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e60d54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:58:18, skipping insertion in model container [2019-10-15 02:58:18,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:14" (2/3) ... [2019-10-15 02:58:18,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e60d54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:58:18, skipping insertion in model container [2019-10-15 02:58:18,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:58:18" (3/3) ... [2019-10-15 02:58:18,772 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2019-10-15 02:58:18,784 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 02:58:18,801 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 02:58:18,813 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 02:58:18,860 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 02:58:18,860 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 02:58:18,860 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 02:58:18,860 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 02:58:18,861 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 02:58:18,861 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 02:58:18,861 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 02:58:18,861 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 02:58:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states. [2019-10-15 02:58:18,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-15 02:58:18,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:18,918 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:18,921 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:18,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:18,927 INFO L82 PathProgramCache]: Analyzing trace with hash 394282032, now seen corresponding path program 1 times [2019-10-15 02:58:18,937 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:18,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040993805] [2019-10-15 02:58:18,937 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:18,938 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:18,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-15 02:58:19,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040993805] [2019-10-15 02:58:19,726 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:58:19,726 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 02:58:19,727 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493558417] [2019-10-15 02:58:19,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 02:58:19,734 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:19,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 02:58:19,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 02:58:19,753 INFO L87 Difference]: Start difference. First operand 448 states. Second operand 3 states. [2019-10-15 02:58:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:20,107 INFO L93 Difference]: Finished difference Result 1214 states and 1590 transitions. [2019-10-15 02:58:20,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 02:58:20,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2019-10-15 02:58:20,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:20,134 INFO L225 Difference]: With dead ends: 1214 [2019-10-15 02:58:20,135 INFO L226 Difference]: Without dead ends: 778 [2019-10-15 02:58:20,143 INFO L600 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 [2019-10-15 02:58:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2019-10-15 02:58:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 778. [2019-10-15 02:58:20,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2019-10-15 02:58:20,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1012 transitions. [2019-10-15 02:58:20,275 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1012 transitions. Word has length 83 [2019-10-15 02:58:20,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:20,276 INFO L462 AbstractCegarLoop]: Abstraction has 778 states and 1012 transitions. [2019-10-15 02:58:20,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 02:58:20,277 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1012 transitions. [2019-10-15 02:58:20,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-15 02:58:20,284 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:20,284 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:20,284 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:20,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:20,285 INFO L82 PathProgramCache]: Analyzing trace with hash 226321823, now seen corresponding path program 1 times [2019-10-15 02:58:20,285 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:20,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237895275] [2019-10-15 02:58:20,286 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:20,286 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:20,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-15 02:58:20,614 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237895275] [2019-10-15 02:58:20,615 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:58:20,615 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 02:58:20,615 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334413290] [2019-10-15 02:58:20,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 02:58:20,617 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:20,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 02:58:20,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 02:58:20,618 INFO L87 Difference]: Start difference. First operand 778 states and 1012 transitions. Second operand 3 states. [2019-10-15 02:58:20,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:20,704 INFO L93 Difference]: Finished difference Result 1501 states and 1981 transitions. [2019-10-15 02:58:20,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 02:58:20,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2019-10-15 02:58:20,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:20,718 INFO L225 Difference]: With dead ends: 1501 [2019-10-15 02:58:20,718 INFO L226 Difference]: Without dead ends: 1482 [2019-10-15 02:58:20,720 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 02:58:20,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2019-10-15 02:58:20,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1440. [2019-10-15 02:58:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1440 states. [2019-10-15 02:58:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1895 transitions. [2019-10-15 02:58:20,858 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1895 transitions. Word has length 81 [2019-10-15 02:58:20,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:20,864 INFO L462 AbstractCegarLoop]: Abstraction has 1440 states and 1895 transitions. [2019-10-15 02:58:20,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 02:58:20,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1895 transitions. [2019-10-15 02:58:20,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 02:58:20,882 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:20,885 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:20,885 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:20,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:20,885 INFO L82 PathProgramCache]: Analyzing trace with hash -521682506, now seen corresponding path program 1 times [2019-10-15 02:58:20,886 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:20,886 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355716391] [2019-10-15 02:58:20,886 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:20,886 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:20,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-15 02:58:21,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355716391] [2019-10-15 02:58:21,287 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:58:21,287 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 02:58:21,287 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408780196] [2019-10-15 02:58:21,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 02:58:21,288 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:21,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 02:58:21,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 02:58:21,289 INFO L87 Difference]: Start difference. First operand 1440 states and 1895 transitions. Second operand 3 states. [2019-10-15 02:58:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:21,631 INFO L93 Difference]: Finished difference Result 3160 states and 4150 transitions. [2019-10-15 02:58:21,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 02:58:21,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2019-10-15 02:58:21,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:21,644 INFO L225 Difference]: With dead ends: 3160 [2019-10-15 02:58:21,644 INFO L226 Difference]: Without dead ends: 1747 [2019-10-15 02:58:21,652 INFO L600 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 [2019-10-15 02:58:21,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2019-10-15 02:58:21,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1728. [2019-10-15 02:58:21,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1728 states. [2019-10-15 02:58:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2266 transitions. [2019-10-15 02:58:21,752 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2266 transitions. Word has length 118 [2019-10-15 02:58:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:21,753 INFO L462 AbstractCegarLoop]: Abstraction has 1728 states and 2266 transitions. [2019-10-15 02:58:21,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 02:58:21,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2266 transitions. [2019-10-15 02:58:21,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-15 02:58:21,760 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:21,760 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:21,761 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:21,761 INFO L82 PathProgramCache]: Analyzing trace with hash -881599301, now seen corresponding path program 1 times [2019-10-15 02:58:21,762 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:21,762 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929883911] [2019-10-15 02:58:21,762 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:21,762 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:21,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-10-15 02:58:22,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929883911] [2019-10-15 02:58:22,081 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:58:22,081 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 02:58:22,082 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125352262] [2019-10-15 02:58:22,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 02:58:22,083 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:22,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 02:58:22,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 02:58:22,084 INFO L87 Difference]: Start difference. First operand 1728 states and 2266 transitions. Second operand 5 states. [2019-10-15 02:58:22,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:22,408 INFO L93 Difference]: Finished difference Result 3662 states and 4760 transitions. [2019-10-15 02:58:22,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 02:58:22,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2019-10-15 02:58:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:22,427 INFO L225 Difference]: With dead ends: 3662 [2019-10-15 02:58:22,427 INFO L226 Difference]: Without dead ends: 1953 [2019-10-15 02:58:22,434 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-15 02:58:22,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2019-10-15 02:58:22,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1734. [2019-10-15 02:58:22,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1734 states. [2019-10-15 02:58:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2270 transitions. [2019-10-15 02:58:22,524 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2270 transitions. Word has length 166 [2019-10-15 02:58:22,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:22,526 INFO L462 AbstractCegarLoop]: Abstraction has 1734 states and 2270 transitions. [2019-10-15 02:58:22,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 02:58:22,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2270 transitions. [2019-10-15 02:58:22,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-15 02:58:22,532 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:22,533 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:22,533 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:22,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:22,533 INFO L82 PathProgramCache]: Analyzing trace with hash 515293493, now seen corresponding path program 1 times [2019-10-15 02:58:22,534 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:22,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525295528] [2019-10-15 02:58:22,534 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:22,534 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:22,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-15 02:58:23,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525295528] [2019-10-15 02:58:23,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497185599] [2019-10-15 02:58:23,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:24,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 3732 conjuncts, 59 conjunts are in the unsatisfiable core [2019-10-15 02:58:24,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:58:24,695 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2019-10-15 02:58:24,695 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:24,778 INFO L567 ElimStorePlain]: treesize reduction 4, result has 85.2 percent of original size [2019-10-15 02:58:24,779 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-10-15 02:58:24,779 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:23 [2019-10-15 02:58:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-15 02:58:25,566 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:58:25,781 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-15 02:58:27,347 WARN L191 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 204 DAG size of output: 86 [2019-10-15 02:58:27,606 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-15 02:58:27,930 WARN L191 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-15 02:58:28,198 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2019-10-15 02:58:28,468 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-15 02:58:28,712 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-15 02:58:29,036 WARN L191 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2019-10-15 02:58:29,269 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-15 02:58:29,537 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-15 02:58:29,785 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-15 02:58:30,080 WARN L191 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-10-15 02:58:30,334 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-15 02:58:30,639 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-15 02:58:30,895 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-15 02:58:31,159 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 54 [2019-10-15 02:58:31,473 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-15 02:58:32,905 WARN L191 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 204 DAG size of output: 85 [2019-10-15 02:58:33,144 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-15 02:58:33,400 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 02:58:33,634 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2019-10-15 02:58:33,880 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-15 02:58:34,118 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-15 02:58:34,381 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-10-15 02:58:34,648 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-15 02:58:34,915 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 02:58:35,179 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 02:58:35,470 WARN L191 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2019-10-15 02:58:35,733 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-15 02:58:36,058 WARN L191 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 02:58:36,313 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 02:58:36,579 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 54 [2019-10-15 02:58:36,919 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-15 02:58:38,315 WARN L191 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 204 DAG size of output: 85 [2019-10-15 02:58:38,536 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-15 02:58:38,777 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 02:58:39,040 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2019-10-15 02:58:39,259 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-15 02:58:39,481 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-15 02:58:39,734 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-10-15 02:58:39,959 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-15 02:58:40,195 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 02:58:40,439 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 02:58:40,704 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2019-10-15 02:58:40,932 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-15 02:58:41,185 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 02:58:41,417 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 02:58:41,565 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-15 02:58:43,031 WARN L191 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 204 DAG size of output: 84 [2019-10-15 02:58:43,268 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-15 02:58:43,520 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-15 02:58:43,740 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-10-15 02:58:43,978 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-15 02:58:44,208 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-15 02:58:44,462 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2019-10-15 02:58:44,697 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-15 02:58:44,934 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-15 02:58:45,167 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-15 02:58:45,315 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-15 02:58:46,581 WARN L191 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 204 DAG size of output: 80 [2019-10-15 02:58:46,750 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-10-15 02:58:46,938 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-15 02:58:47,106 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2019-10-15 02:58:47,278 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-10-15 02:58:47,431 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-10-15 02:58:47,603 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-15 02:58:48,950 WARN L191 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 204 DAG size of output: 84 [2019-10-15 02:58:49,198 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-15 02:58:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-15 02:58:49,399 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 02:58:49,399 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [15, 6] imperfect sequences [6] total 23 [2019-10-15 02:58:49,400 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746868818] [2019-10-15 02:58:49,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 02:58:49,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:49,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 02:58:49,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2019-10-15 02:58:49,401 INFO L87 Difference]: Start difference. First operand 1734 states and 2270 transitions. Second operand 19 states. [2019-10-15 02:58:51,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:51,412 INFO L93 Difference]: Finished difference Result 2734 states and 3605 transitions. [2019-10-15 02:58:51,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 02:58:51,414 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 191 [2019-10-15 02:58:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:51,425 INFO L225 Difference]: With dead ends: 2734 [2019-10-15 02:58:51,425 INFO L226 Difference]: Without dead ends: 1836 [2019-10-15 02:58:51,430 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 363 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2019-10-15 02:58:51,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2019-10-15 02:58:51,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1746. [2019-10-15 02:58:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1746 states. [2019-10-15 02:58:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2282 transitions. [2019-10-15 02:58:51,527 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2282 transitions. Word has length 191 [2019-10-15 02:58:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:51,527 INFO L462 AbstractCegarLoop]: Abstraction has 1746 states and 2282 transitions. [2019-10-15 02:58:51,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 02:58:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2282 transitions. [2019-10-15 02:58:51,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-15 02:58:51,536 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:51,536 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:51,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:51,746 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:51,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:51,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1559019880, now seen corresponding path program 1 times [2019-10-15 02:58:51,747 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:51,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040836257] [2019-10-15 02:58:51,747 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:51,748 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:51,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-15 02:58:52,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040836257] [2019-10-15 02:58:52,011 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:58:52,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 02:58:52,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723511645] [2019-10-15 02:58:52,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 02:58:52,015 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:52,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 02:58:52,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 02:58:52,015 INFO L87 Difference]: Start difference. First operand 1746 states and 2282 transitions. Second operand 3 states.